diff --git a/integration_test/magnet_real_test.dart b/integration_test/magnet_real_test.dart
index 644cbfe..0e485ea 100644
--- a/integration_test/magnet_real_test.dart
+++ b/integration_test/magnet_real_test.dart
@@ -65,7 +65,7 @@ void main() {
 
       final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
       c.settings
-        ..downloadRoot = dir.path
+        ..download.root = dir.path
         ..network.mode = forced ? 'custom' : 'system'
         ..network.primary = '8.8.8.8'
         ..network.secondary = '8.8.4.4';
diff --git a/integration_test/windows_cookie_shot_test.dart b/integration_test/windows_cookie_shot_test.dart
index 10ba3d9..d119dbf 100644
--- a/integration_test/windows_cookie_shot_test.dart
+++ b/integration_test/windows_cookie_shot_test.dart
@@ -75,7 +75,7 @@ void main() {
         await settle();
         await t.tap(find.text(tr('사용 안 함')).last);
         await settle(15);
-        expect(c.settings.ytCookiesBrowser, '');
+        expect(c.settings.download.ytCookiesBrowser, '');
         expect(cookie.existsSync(), isFalse, reason: '쓰지 않게 바꾸면 내보낸 쿠키 파일을 지움');
         expect(find.text(tr('쿠키 파일 지우기')), findsNothing, reason: '파일이 없고 쓰지 않으면 안내도 숨김');
         await shot('2_off');
diff --git a/integration_test/windows_dlcancel_shot_test.dart b/integration_test/windows_dlcancel_shot_test.dart
index bfaf2fc..20a3080 100644
--- a/integration_test/windows_dlcancel_shot_test.dart
+++ b/integration_test/windows_dlcancel_shot_test.dart
@@ -58,7 +58,7 @@ void main() {
         final tmp = testTempDir('jj_dlcancel_');
         final d = DownloadManager(
           backends: [_Backend(DownloadKind.video), _Backend(DownloadKind.torrent)],
-          settings: () => AppSettings()..downloadRoot = tmp.path,
+          settings: () => AppSettings()..download.root = tmp.path,
           readClipboard: () async => null,
         );
         final shotKey = GlobalKey();
diff --git a/integration_test/windows_magnet_shot_test.dart b/integration_test/windows_magnet_shot_test.dart
index 81b7565..f42bd5a 100644
--- a/integration_test/windows_magnet_shot_test.dart
+++ b/integration_test/windows_magnet_shot_test.dart
@@ -57,7 +57,7 @@ void main() {
         addTearDown(() => i18n.apply('ko', save: false));
         final d = DownloadManager(
           backends: [_Quiet(DownloadKind.video), _Quiet(DownloadKind.torrent)],
-          settings: () => AppSettings()..downloadRoot = r'D:\dl',
+          settings: () => AppSettings()..download.root = r'D:\dl',
           readClipboard: () async => null,
         );
         // ① 메타데이터를 받는 중 (dn 이름 · 움직이는 "준비 중…") ② 멈춤 (이유 후보 · [다시 시도]) ③ 이름이 없는 마그넷
diff --git a/lib/app/app_controller.dart b/lib/app/app_controller.dart
index a7016ff..cca845c 100644
--- a/lib/app/app_controller.dart
+++ b/lib/app/app_controller.dart
@@ -94,7 +94,7 @@ class AppController extends ChangeNotifier {
   /// 다운로드 폴더가 있는 드라이브 (예: "M:\\"). 설정이 바뀔 때만 다시 알아낸다.
   String? _diskFor, _diskRoot;
   String _downloadDisk() {
-    final key = settings.downloadRoot ?? '';
+    final key = settings.download.root ?? '';
     if (_diskRoot == null || _diskFor != key) {
       _diskFor = key;
       try {
diff --git a/lib/app/download_manager.dart b/lib/app/download_manager.dart
index 41707b8..3c66d09 100644
--- a/lib/app/download_manager.dart
+++ b/lib/app/download_manager.dart
@@ -126,7 +126,7 @@ class DownloadManager extends ChangeNotifier {
 
   /// 클립보드가 바뀌었으면 주소를 찾아 다운로드 추가
   Future<List<DownloadTask>> checkClipboard() async {
-    if (!settings().clipboardWatch) return const [];
+    if (!settings().download.clipboardWatch) return const [];
     final text = await _safeRead();
     if (text == null || text == _lastClip) return const [];
     _lastClip = text;
@@ -158,7 +158,7 @@ class DownloadManager extends ChangeNotifier {
     tasks.insert(0, t);
     _added.add(t);
     // YouTube 재생목록: 목록을 읽어 영상마다 한 줄씩 바꿔 넣는다
-    if (link.kind == DownloadKind.video && s.ytExpandPlaylists && youtubePlaylistId(link.url) != null) {
+    if (link.kind == DownloadKind.video && s.download.ytExpandPlaylists && youtubePlaylistId(link.url) != null) {
       t
         ..expanding = true
         ..title = trf('재생목록 불러오는 중…  {0}', [link.url]);
@@ -270,7 +270,7 @@ class DownloadManager extends ChangeNotifier {
 
   /// 동시 다운로드 수 안에서 대기 중인 작업을 들어온 순서대로 시작
   void _pump() {
-    final limit = settings().maxParallelDownloads;
+    final limit = settings().download.maxParallel;
     var running = tasks.where((t) => t.state == DownloadState.downloading).length;
     final waiting = tasks.where((t) => t.state == DownloadState.queued && !t.expanding).toList()
       ..sort((a, b) => int.parse(a.id).compareTo(int.parse(b.id)));
diff --git a/lib/app/settings.dart b/lib/app/settings.dart
index 1a414ef..4df1fc1 100644
--- a/lib/app/settings.dart
+++ b/lib/app/settings.dart
@@ -15,6 +15,7 @@ import '../services/app_shell.dart' show appIconOf;
 import '../core/remote_idle.dart';
 import 'settings/records.dart';
 import 'settings/settings_group.dart';
+import 'settings/download_settings.dart';
 import 'settings/reader_settings.dart';
 import 'settings/ai_image_settings.dart';
 import 'settings/copy_settings.dart';
@@ -25,6 +26,7 @@ import 'settings/explorer_settings.dart';
 export 'settings/records.dart';
 export 'settings/settings_group.dart';
 export 'settings/settings_store.dart';
+export 'settings/download_settings.dart';
 export 'settings/reader_settings.dart';
 export 'settings/ai_image_settings.dart';
 export 'settings/copy_settings.dart';
@@ -53,11 +55,7 @@ class AppSettings {
   /// 웹 브라우저 위에 다른 화면이 올라오거나 다른 화면으로 가면 페이지의 동영상 · 소리를 멈춤 (끄면 계속 들림)
   bool webPauseOnLeave = true;
 
-  /// 다운로드 위치 (아래에 jj_yt-dlp, jj_aria2 생성). null 이면 프로그램 폴더
-  String? downloadRoot;
 
-  /// Ctrl+C 로 복사한 주소를 자동으로 다운로드
-  bool clipboardWatch = true;
 
   /// 최소화하면 작업 표시줄 대신 트레이로
   bool minimizeToTray = true;
@@ -72,36 +70,18 @@ class AppSettings {
   /// AI 자막: 매번 설정 창을 띄울지 (끄면 마지막 설정으로 바로 시작)
   bool askAiOptions = true;
 
-  /// 다운로드가 끝난 동영상을 편집 목록(MKV 만들기)에 자동으로 추가
-  bool addFinishedDownloads = true;
 
-  /// 마그넷 · 토렌트가 이 초 동안 메타데이터 · 피어를 못 받으면 그 줄에 이유 후보 · [다시 시도] (0 = 알리지 않음, 관리자 지시 10/20)
-  int torrentStallSeconds = 60;
 
   /// OpenSubtitles (인터넷 자막 검색) - 키는 필수, 아이디·비밀번호는 선택 (받기 횟수 늘어남)
   String openSubtitlesKey = '';
   String openSubtitlesUser = '';
   String openSubtitlesPassword = '';
 
-  /// YouTube 받을 형식 · 화질 (기본: MP4 최고 화질)
-  YtContainer ytContainer = YtContainer.mp4;
-  YtQuality ytQuality = YtQuality.best;
 
-  /// 36: 같은 크기면 H.264 를 먼저 (휴대폰 · 태블릿은 AV1 · VP9 을 하드웨어로 못 푸는 일이 많음). 기본: Android 켜짐, PC 꺼짐
-  bool ytPreferH264 = Platform.isAndroid;
 
-  /// 재생목록 주소면 목록 전체를 받기
-  bool ytExpandPlaylists = true;
 
-  /// YouTube 로봇 확인 대응: 쿠키를 가져올 브라우저 (빈 값 = 사용 안 함) 또는 cookies.txt 경로
-  String ytCookiesBrowser = internalBrowserCookies; // 기본: 앱 안 브라우저 로그인 사용
 
-  /// 53: 앱 안 브라우저 로그인 쿠키를 넘길 사이트 (처음은 모두 - 28)
-  List<String> loginCookieSites = [...loginCookieDomains];
-  String ytCookiesFile = '';
 
-  /// 동시에 받는 다운로드 수 (0 = 무제한)
-  int maxParallelDownloads = 3;
 
   /// 동시에 만드는 MKV 수 (0 = 무제한)
   int maxParallelJobs = 5;
@@ -420,8 +400,11 @@ class AppSettings {
   /// 보기 화면 (그림 · 만화 · PDF · 문서)
   final reader = ReaderSettings();
 
+  /// 다운로드 · YouTube (yt-dlp · aria2)
+  final download = DownloadSettings();
+
   /// 설정 분야들 (설정 A) - 저마다 자기 키를 읽고 쓴다. toJson · fromJson 은 이 목록을 돌며 합치기만 한다
-  List<SettingsGroup> get groups => [explorer, network, tor, copy, aiImage, reader];
+  List<SettingsGroup> get groups => [explorer, network, tor, copy, aiImage, reader, download];
 
   /// [plainSecrets]: 안전 저장소를 쓸 수 없을 때만 (예전 파일에 있던 비밀 값을 잃지 않게) 예전처럼 파일에 둔다
   Map<String, Object?> toJson({bool plainSecrets = false}) {
@@ -434,14 +417,10 @@ class AppSettings {
         'youtubeAdSkip': youtubeAdSkip,
         'youtubeAdHide': youtubeAdHide,
         'webPauseOnLeave': webPauseOnLeave,
-        'downloadRoot': downloadRoot,
-        'clipboardWatch': clipboardWatch,
         'minimizeToTray': minimizeToTray,
         'closeAction': closeAction,
         'showHotkey': showHotkey,
         'askAiOptions': askAiOptions,
-        'addFinishedDownloads': addFinishedDownloads,
-        'torrentStallSeconds': torrentStallSeconds,
         // 비밀 값은 안전 저장소에 (54). 파일에는 저장해 두었는지만
         'openSubtitlesSaved': {
           'key': openSubtitlesKey.isNotEmpty,
@@ -453,15 +432,7 @@ class AppSettings {
           'openSubtitlesUser': openSubtitlesUser,
           'openSubtitlesPassword': openSubtitlesPassword,
         },
-        'ytContainer': ytContainer.name,
-        'ytQuality': ytQuality.name,
-        'ytPreferH264': ytPreferH264,
-        'ytExpandPlaylists': ytExpandPlaylists,
-        'ytCookiesBrowser': ytCookiesBrowser,
-        'loginCookieSites': loginCookieSites,
         'cookieScopeV2': true,
-        'ytCookiesFile': ytCookiesFile,
-        'maxParallelDownloads': maxParallelDownloads,
         'maxParallelJobs': maxParallelJobs,
         'showLog': showLog,
         'mkvCompactList': mkvCompactList,
@@ -574,27 +545,13 @@ class AppSettings {
       ..youtubeAdSkip = j['youtubeAdSkip'] as bool? ?? true
       ..youtubeAdHide = j['youtubeAdHide'] as bool? ?? true
       ..webPauseOnLeave = j['webPauseOnLeave'] as bool? ?? true
-      ..downloadRoot = j['downloadRoot'] as String?
-      ..clipboardWatch = j['clipboardWatch'] as bool? ?? true
       ..minimizeToTray = j['minimizeToTray'] as bool? ?? true
       ..closeAction = const ['background', 'quit', 'ask'].contains(j['closeAction']) ? j['closeAction'] as String : 'background'
       ..showHotkey = j['showHotkey'] as String? ?? 'Ctrl+Shift+X'
       ..askAiOptions = j['askAiOptions'] as bool? ?? true
-      ..addFinishedDownloads = j['addFinishedDownloads'] as bool? ?? true
-      ..torrentStallSeconds = const [0, 30, 60, 120, 300].contains(j['torrentStallSeconds']) ? j['torrentStallSeconds'] as int : 60
       ..openSubtitlesKey = j['openSubtitlesKey'] as String? ?? ''
       ..openSubtitlesUser = j['openSubtitlesUser'] as String? ?? ''
       ..openSubtitlesPassword = j['openSubtitlesPassword'] as String? ?? ''
-      ..ytContainer = pick(YtContainer.values, j['ytContainer'], YtContainer.mp4)
-      ..ytPreferH264 = j['ytPreferH264'] is bool ? j['ytPreferH264'] as bool : Platform.isAndroid
-      ..ytQuality = pick(YtQuality.values, j['ytQuality'], YtQuality.best)
-      ..ytExpandPlaylists = j['ytExpandPlaylists'] as bool? ?? true
-      ..ytCookiesBrowser = j['ytCookiesBrowser'] as String? ?? internalBrowserCookies
-      ..loginCookieSites = j['loginCookieSites'] is List
-          ? [for (final x in j['loginCookieSites'] as List) if (loginCookieDomains.contains(x)) '$x']
-          : [...loginCookieDomains]
-      ..ytCookiesFile = j['ytCookiesFile'] as String? ?? ''
-      ..maxParallelDownloads = (j['maxParallelDownloads'] as num?)?.toInt() ?? 3
       ..maxParallelJobs = (j['maxParallelJobs'] as num?)?.toInt() ?? 5
       ..showLog = j['showLog'] as bool? ?? true
       ..mkvCompactList = const ['auto', 'small', 'large'].contains(j['mkvCompactList']) ? j['mkvCompactList'] as String : 'auto'
@@ -803,7 +760,7 @@ class AppSettings {
 
   /// 다운로드 기본 위치: 프로그램 폴더 (쓸 수 없으면 사용자 다운로드 폴더)
   String resolvedDownloadRoot() {
-    if (downloadRoot != null && downloadRoot!.isNotEmpty) return downloadRoot!;
+    if (download.root != null && download.root!.isNotEmpty) return download.root!;
     // Android: 프로그램 폴더가 없으므로 내장 저장소의 Download\JJ_MKVMaker
     if (Platform.isAndroid) return '/storage/emulated/0/Download/JJ_MKVMaker';
     final appDir = p.dirname(Platform.resolvedExecutable);
diff --git a/lib/app/settings/download_settings.dart b/lib/app/settings/download_settings.dart
new file mode 100644
index 0000000..75454fb
--- /dev/null
+++ b/lib/app/settings/download_settings.dart
@@ -0,0 +1,76 @@
+import 'dart:io';
+
+import '../../core/download_detect.dart';
+import 'settings_group.dart';
+
+/// 약속 (설정 A): 환경 설정 > 다운로드 · YouTube (yt-dlp · aria2) - 자기 키 (이름 · 처음 값 · 읽기 · 쓰기) 를 스스로 갖는다.
+/// 설정 하나를 더할 때는 이 파일만 고친다. 저장 파일의 키 이름은 예전 그대로 (평평한 키)
+class DownloadSettings implements SettingsGroup {
+  /// 다운로드 위치 (아래에 jj_yt-dlp, jj_aria2 생성). null 이면 프로그램 폴더
+  String? root;
+
+  /// Ctrl+C 로 복사한 주소를 자동으로 다운로드
+  bool clipboardWatch = true;
+
+  /// 다운로드가 끝난 동영상을 편집 목록(MKV 만들기)에 자동으로 추가
+  bool addFinished = true;
+
+  /// 마그넷 · 토렌트가 이 초 동안 메타데이터 · 피어를 못 받으면 그 줄에 이유 후보 · [다시 시도] (0 = 알리지 않음, 관리자 지시 10/20)
+  int torrentStallSeconds = 60;
+
+  /// YouTube 받을 형식 · 화질 (기본: MP4 최고 화질)
+  YtContainer ytContainer = YtContainer.mp4;
+
+  YtQuality ytQuality = YtQuality.best;
+
+  /// 36: 같은 크기면 H.264 를 먼저 (휴대폰 · 태블릿은 AV1 · VP9 을 하드웨어로 못 푸는 일이 많음). 기본: Android 켜짐, PC 꺼짐
+  bool ytPreferH264 = Platform.isAndroid;
+
+  /// 재생목록 주소면 목록 전체를 받기
+  bool ytExpandPlaylists = true;
+
+  /// YouTube 로봇 확인 대응: 쿠키를 가져올 브라우저 (빈 값 = 사용 안 함) 또는 cookies.txt 경로
+  String ytCookiesBrowser = internalBrowserCookies; // 기본: 앱 안 브라우저 로그인 사용
+
+  /// 53: 앱 안 브라우저 로그인 쿠키를 넘길 사이트 (처음은 모두 - 28)
+  List<String> loginCookieSites = [...loginCookieDomains];
+
+  String ytCookiesFile = '';
+
+  /// 동시에 받는 다운로드 수 (0 = 무제한)
+  int maxParallel = 3;
+
+  @override
+  void write(Map<String, Object?> j, {required bool plainSecrets}) {
+    j['downloadRoot'] = root;
+    j['clipboardWatch'] = clipboardWatch;
+    j['addFinishedDownloads'] = addFinished;
+    j['torrentStallSeconds'] = torrentStallSeconds;
+    j['ytContainer'] = ytContainer.name;
+    j['ytQuality'] = ytQuality.name;
+    j['ytPreferH264'] = ytPreferH264;
+    j['ytExpandPlaylists'] = ytExpandPlaylists;
+    j['ytCookiesBrowser'] = ytCookiesBrowser;
+    j['loginCookieSites'] = loginCookieSites;
+    j['ytCookiesFile'] = ytCookiesFile;
+    j['maxParallelDownloads'] = maxParallel;
+  }
+
+  @override
+  void read(Map<String, dynamic> j) {
+    root = j['downloadRoot'] as String?;
+    clipboardWatch = j['clipboardWatch'] as bool? ?? true;
+    addFinished = j['addFinishedDownloads'] as bool? ?? true;
+    torrentStallSeconds = const [0, 30, 60, 120, 300].contains(j['torrentStallSeconds']) ? j['torrentStallSeconds'] as int : 60;
+    ytContainer = pickEnum(YtContainer.values, j['ytContainer'], YtContainer.mp4);
+    ytPreferH264 = j['ytPreferH264'] is bool ? j['ytPreferH264'] as bool : Platform.isAndroid;
+    ytQuality = pickEnum(YtQuality.values, j['ytQuality'], YtQuality.best);
+    ytExpandPlaylists = j['ytExpandPlaylists'] as bool? ?? true;
+    ytCookiesBrowser = j['ytCookiesBrowser'] as String? ?? internalBrowserCookies;
+    loginCookieSites = j['loginCookieSites'] is List
+        ? [for (final x in j['loginCookieSites'] as List) if (loginCookieDomains.contains(x)) '$x']
+        : [...loginCookieDomains];
+    ytCookiesFile = j['ytCookiesFile'] as String? ?? '';
+    maxParallel = (j['maxParallelDownloads'] as num?)?.toInt() ?? 3;
+  }
+}
diff --git a/lib/app/settings/settings_group.dart b/lib/app/settings/settings_group.dart
index 0be6743..91613cd 100644
--- a/lib/app/settings/settings_group.dart
+++ b/lib/app/settings/settings_group.dart
@@ -8,3 +8,7 @@ abstract class SettingsGroup {
   /// 설정 파일 [j] 에서 읽는다 - 없거나 틀린 값은 처음 값 (또는 고친 값)
   void read(Map<String, dynamic> j);
 }
+
+/// 저장된 이름으로 열거형 값 고르기 (모르는 이름 · 없으면 [fallback]) - 분야들의 읽기가 같이 쓴다
+T pickEnum<T extends Enum>(List<T> values, Object? name, T fallback) =>
+    values.firstWhere((v) => v.name == name, orElse: () => fallback);
diff --git a/lib/main.dart b/lib/main.dart
index 9470c74..bbe1180 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -298,7 +298,7 @@ Future<void> main(List<String> args) async {
   downloads.addListener(() => services.shell.setTooltip(syncAlert.tooltip()));
   // 다 받은 동영상 → 편집 목록 (설정에서 끌 수 있음)
   downloads.onFinished.listen((t) async {
-    if (!controller.settings.addFinishedDownloads) return;
+    if (!controller.settings.download.addFinished) return;
     final files = DownloadManager.videoFilesOf(t);
     if (files.isEmpty) return;
     final n = await controller.addDownloaded(files);
@@ -308,7 +308,7 @@ Future<void> main(List<String> args) async {
     showAddedToMkvNotice(messengerKey, navigatorKey, controller, title: t.title, files: files, added: n);
   });
   downloads.setAutoAdd = (on) async {
-    await controller.updateSettings((x) => x.addFinishedDownloads = on);
+    await controller.updateSettings((x) => x.download.addFinished = on);
     downloads.refresh();
   };
   downloads.useSystemDns = () async {
@@ -619,7 +619,7 @@ Future<void> runAndroid(String dataDir) async {
   watchDnsFailure(messengerKey, controller);
   // 다 받은 동영상 → 편집 목록 (설정에서 끌 수 있음)
   downloads.onFinished.listen((t) async {
-    if (!controller.settings.addFinishedDownloads) return;
+    if (!controller.settings.download.addFinished) return;
     final files = DownloadManager.videoFilesOf(t);
     if (files.isEmpty) return;
     final n = await controller.addDownloaded(files);
@@ -628,7 +628,7 @@ Future<void> runAndroid(String dataDir) async {
     showAddedToMkvNotice(messengerKey, navigatorKey, controller, title: t.title, files: files, added: n);
   });
   downloads.setAutoAdd = (on) async {
-    await controller.updateSettings((x) => x.addFinishedDownloads = on);
+    await controller.updateSettings((x) => x.download.addFinished = on);
     downloads.refresh();
   };
   downloads.useSystemDns = () async {
diff --git a/lib/platform/android/android_download_tools.dart b/lib/platform/android/android_download_tools.dart
index b7d8091..f770a1b 100644
--- a/lib/platform/android/android_download_tools.dart
+++ b/lib/platform/android/android_download_tools.dart
@@ -71,10 +71,10 @@ class AndroidDownloadTools {
         // --ffmpeg-location 은 파일 경로도 받는다 (libffmpeg.so = ffmpeg 실행 파일)
         ffmpegDir: t.ffmpeg,
         jsRuntime: 'quickjs:${t.quickjs}',
-        formatArgs: () => ytDlpFormatArgs(s().ytContainer, s().ytQuality, preferH264: s().ytPreferH264),
+        formatArgs: () => ytDlpFormatArgs(s().download.ytContainer, s().download.ytQuality, preferH264: s().download.ytPreferH264),
         cookieArgs: () => ytDlpCookieArgs(
-          browser: s().ytCookiesBrowser,
-          file: s().ytCookiesFile,
+          browser: s().download.ytCookiesBrowser,
+          file: s().download.ytCookiesFile,
           internalCookieFile: s().internalCookieFile,
         ),
         fallbackCookieArgs: () =>
@@ -84,7 +84,7 @@ class AndroidDownloadTools {
     _Deferred(DownloadKind.torrent, () async {
       final t = await ready();
       return Aria2Backend(aria2c: t.aria2c, environment: t.environment, extraArgs: ['--ca-certificate=${t.cert}'],
-          stallAfter: () => Duration(seconds: s().torrentStallSeconds));
+          stallAfter: () => Duration(seconds: s().download.torrentStallSeconds));
     }),
   ];
 }
diff --git a/lib/services/platform_services.dart b/lib/services/platform_services.dart
index 3ca7c5e..1071e85 100644
--- a/lib/services/platform_services.dart
+++ b/lib/services/platform_services.dart
@@ -97,17 +97,17 @@ class PlatformServices {
         createDownloadBackends: (s) => [
           YtDlpBackend(
             ffmpegDir: ffmpegDir,
-            formatArgs: () => ytDlpFormatArgs(s().ytContainer, s().ytQuality, preferH264: s().ytPreferH264),
+            formatArgs: () => ytDlpFormatArgs(s().download.ytContainer, s().download.ytQuality, preferH264: s().download.ytPreferH264),
             cookieArgs: () => ytDlpCookieArgs(
-                browser: s().ytCookiesBrowser,
-                file: s().ytCookiesFile,
+                browser: s().download.ytCookiesBrowser,
+                file: s().download.ytCookiesFile,
                 internalProfile: s().internalCookieProfile,
                 internalCookieFile: s().internalCookieFile),
             // 고른 브라우저의 쿠키를 못 읽으면 앱 안 브라우저의 쿠키로
             fallbackCookieArgs: () => ytDlpCookieArgs(
                 browser: internalBrowserCookies, internalCookieFile: s().internalCookieFile),
           ),
-          Aria2Backend(stallAfter: () => Duration(seconds: s().torrentStallSeconds)),
+          Aria2Backend(stallAfter: () => Duration(seconds: s().download.torrentStallSeconds)),
         ],
         shell: DesktopShell(),
         updater: GitHubUpdater(),
diff --git a/lib/ui/browser_page.dart b/lib/ui/browser_page.dart
index 850b140..901d2d6 100644
--- a/lib/ui/browser_page.dart
+++ b/lib/ui/browser_page.dart
@@ -545,8 +545,8 @@ class _BrowserPageState extends State<BrowserPage> with RouteAware {
   /// 53: 쿠키를 쓰도록 정했을 때만 · 고른 사이트만 내보낸다
   void _applyCookieExport() {
     final s = widget.c.settings;
-    CookieExport.enabled = s.ytCookiesBrowser == internalBrowserCookies;
-    CookieExport.sites = s.loginCookieSites;
+    CookieExport.enabled = s.download.ytCookiesBrowser == internalBrowserCookies;
+    CookieExport.sites = s.download.loginCookieSites;
   }
 
   /// 53: 쿠키 · 방문 기록 지우기 (확인 뒤). 다운로드용으로 내보낸 쿠키 파일도 지운다
diff --git a/lib/ui/downloads_page.dart b/lib/ui/downloads_page.dart
index f883617..f6feae5 100644
--- a/lib/ui/downloads_page.dart
+++ b/lib/ui/downloads_page.dart
@@ -164,11 +164,11 @@ class _DownloadsPageState extends State<DownloadsPage> {
                       message: tr('다 받으면 MKV 만들기의 동영상 목록에 자동으로 넣고, 이 다운로드 목록에서는 뺍니다 (받은 파일은 그대로)'),
                       child: InkWell(
                         borderRadius: BorderRadius.circular(4),
-                        onTap: () => d.setAutoAdd!(!d.settings().addFinishedDownloads),
+                        onTap: () => d.setAutoAdd!(!d.settings().download.addFinished),
                         child: Row(mainAxisSize: MainAxisSize.min, children: [
                           Checkbox(
                             visualDensity: VisualDensity.compact,
-                            value: d.settings().addFinishedDownloads,
+                            value: d.settings().download.addFinished,
                             onChanged: (v) => d.setAutoAdd!(v ?? false),
                           ),
                           Padding(
diff --git a/lib/ui/settings/transfer_sections.dart b/lib/ui/settings/transfer_sections.dart
index 9cf9de3..6769543 100644
--- a/lib/ui/settings/transfer_sections.dart
+++ b/lib/ui/settings/transfer_sections.dart
@@ -76,14 +76,14 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
     return Column(crossAxisAlignment: CrossAxisAlignment.stretch, mainAxisSize: MainAxisSize.min, children: [
                     if (desk)
                     SwitchListTile(
-                      value: s.clipboardWatch,
-                      onChanged: (v) => c.updateSettings((x) => x.clipboardWatch = v),
+                      value: s.download.clipboardWatch,
+                      onChanged: (v) => c.updateSettings((x) => x.download.clipboardWatch = v),
                       title: Text(tr('복사(Ctrl+C)한 주소 자동 다운로드')),
                       subtitle: Text(tr('YouTube → yt-dlp, 마그넷 · .torrent → aria2 (완료 후 올려 주기 안 함)')),
                     ),
                     SwitchListTile(
-                      value: s.addFinishedDownloads,
-                      onChanged: (v) => c.updateSettings((x) => x.addFinishedDownloads = v),
+                      value: s.download.addFinished,
+                      onChanged: (v) => c.updateSettings((x) => x.download.addFinished = v),
                       title: Text(tr('완료 시 자동 동영상 추가')),
                       subtitle: Text(tr('다 받는 대로 MKV 만들기의 동영상 목록에 넣고, 다운로드 목록에서는 뺍니다 (다운로드 화면의 체크 상자와 같음)')),
                     ),
@@ -92,59 +92,59 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
                       title: Text(tr('마그넷 · 토렌트가 시작되지 않으면 알리기')),
                       subtitle: Text(tr('메타데이터나 피어를 이 시간 동안 못 받으면 그 줄에 이유 후보와 [다시 시도] 를 보입니다')),
                       trailing: DropdownButton<int>(
-                        value: s.torrentStallSeconds,
+                        value: s.download.torrentStallSeconds,
                         items: [
                           for (final v in const [30, 60, 120, 300]) DropdownMenuItem(value: v, child: Text(trf('{0}초', [v]))),
                           DropdownMenuItem(value: 0, child: Text(tr('알리지 않음'))),
                         ],
-                        onChanged: (v) => c.updateSettings((x) => x.torrentStallSeconds = v!),
+                        onChanged: (v) => c.updateSettings((x) => x.download.torrentStallSeconds = v!),
                       ),
                     ),
                     SettingTile(
                       title: Text(tr('YouTube 받을 형식')),
                       subtitle: Text(tr('기본: MP4. 음성만 받으면 MP3 · M4A 로 저장')),
                       trailing: DropdownButton<YtContainer>(
-                        value: s.ytContainer,
+                        value: s.download.ytContainer,
                         items: [for (final v in YtContainer.values) DropdownMenuItem(value: v, child: Text(v.label))],
-                        onChanged: (v) => c.updateSettings((x) => x.ytContainer = v!),
+                        onChanged: (v) => c.updateSettings((x) => x.download.ytContainer = v!),
                       ),
                     ),
                     SettingTile(
-                      enabled: !s.ytContainer.audioOnly,
+                      enabled: !s.download.ytContainer.audioOnly,
                       title: Text(tr('YouTube 화질')),
                       subtitle: Text(tr('고른 크기 이하에서 가장 좋은 화질 (영상에 없는 크기면 가까운 것)')),
                       trailing: DropdownButton<YtQuality>(
-                        value: s.ytQuality,
+                        value: s.download.ytQuality,
                         items: [for (final v in YtQuality.values) DropdownMenuItem(value: v, child: Text(v.label))],
-                        onChanged: s.ytContainer.audioOnly ? null : (v) => c.updateSettings((x) => x.ytQuality = v!),
+                        onChanged: s.download.ytContainer.audioOnly ? null : (v) => c.updateSettings((x) => x.download.ytQuality = v!),
                       ),
                     ),
                     // 36: 같은 크기면 H.264 먼저 (Android 기본 켜짐)
                     SwitchListTile(
-                      value: s.ytPreferH264,
-                      onChanged: s.ytContainer.audioOnly ? null : (v) => c.updateSettings((x) => x.ytPreferH264 = v),
+                      value: s.download.ytPreferH264,
+                      onChanged: s.download.ytContainer.audioOnly ? null : (v) => c.updateSettings((x) => x.download.ytPreferH264 = v),
                       title: Text(tr('같은 화질이면 H.264 먼저 받기')),
                       subtitle: Text(tr('휴대폰 · 태블릿은 AV1 · VP9 을 하드웨어로 풀지 못해 끊기거나 배터리를 많이 쓰는 일이 있습니다. '
                           'YouTube 의 H.264 는 1080p 까지라 더 큰 화질을 고르면 크기가 먼저입니다.')),
                     ),
                     SwitchListTile(
-                      value: s.ytExpandPlaylists,
-                      onChanged: (v) => c.updateSettings((x) => x.ytExpandPlaylists = v),
+                      value: s.download.ytExpandPlaylists,
+                      onChanged: (v) => c.updateSettings((x) => x.download.ytExpandPlaylists = v),
                       title: Text(tr('재생목록 주소면 목록 전체 받기')),
                       subtitle: Text(tr('영상마다 한 줄씩 보여 주고 jj_yt-dlp\\재생목록 이름\\ 에 저장 (믹스 목록 제외)')),
                     ),
                     SettingTile(
                       title: Text(tr('YouTube 쿠키 (로봇 확인이 나올 때)')),
-                      subtitle: Text(s.ytCookiesFile.isNotEmpty
-                          ? 'cookies.txt: ${s.ytCookiesFile}'
-                          : s.ytCookiesBrowser == internalBrowserCookies
+                      subtitle: Text(s.download.ytCookiesFile.isNotEmpty
+                          ? 'cookies.txt: ${s.download.ytCookiesFile}'
+                          : s.download.ytCookiesBrowser == internalBrowserCookies
                               ? tr('앱 안 브라우저의 로그인 사용 (브라우저 화면에서 YouTube 에 로그인하세요)')
-                              : s.ytCookiesBrowser.isNotEmpty
-                                  ? trf('{0} 브라우저의 YouTube 로그인 쿠키 사용 (Chrome · Edge 는 브라우저를 닫아야 읽힐 수 있음)', [s.ytCookiesBrowser])
+                              : s.download.ytCookiesBrowser.isNotEmpty
+                                  ? trf('{0} 브라우저의 YouTube 로그인 쿠키 사용 (Chrome · Edge 는 브라우저를 닫아야 읽힐 수 있음)', [s.download.ytCookiesBrowser])
                                   : tr('사용 안 함. "Sign in to confirm you\'re not a bot" 오류가 나오면 설정하세요')),
                       trailing: Row(mainAxisSize: MainAxisSize.min, children: [
                         DropdownButton<String>(
-                          value: s.ytCookiesFile.isNotEmpty ? '*file' : s.ytCookiesBrowser,
+                          value: s.download.ytCookiesFile.isNotEmpty ? '*file' : s.download.ytCookiesBrowser,
                           items: [
                             DropdownMenuItem(value: '', child: Text(tr('사용 안 함'))),
                             DropdownMenuItem(value: internalBrowserCookies, child: Text(tr('앱 안 브라우저 (권장)'))),
@@ -162,16 +162,16 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
                                   allowedExtensions: const ['txt']);
                               if (f?.path != null) {
                                 await c.updateSettings((x) => x
-                                  ..ytCookiesFile = f!.path!
-                                  ..ytCookiesBrowser = '');
+                                  ..download.ytCookiesFile = f!.path!
+                                  ..download.ytCookiesBrowser = '');
                               }
                             } else {
                               await c.updateSettings((x) => x
-                                ..ytCookiesBrowser = v ?? ''
-                                ..ytCookiesFile = '');
+                                ..download.ytCookiesBrowser = v ?? ''
+                                ..download.ytCookiesFile = '');
                             }
                             // 131: 앱 안 브라우저 로그인을 더 쓰지 않으면 내보내 둔 평문 쿠키 파일을 지운다
-                            if (c.settings.ytCookiesBrowser != internalBrowserCookies) {
+                            if (c.settings.download.ytCookiesBrowser != internalBrowserCookies) {
                               await deleteExportedCookies(c.settings.webViewDataDir);
                               if (mounted) setState(() {});
                             }
@@ -181,7 +181,7 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
                     ),
                     // 53: 앱 안 브라우저 쿠키 - 어디에 어떻게 저장되는지 · 넘길 사이트 고르기 · 지우기
                     // 131: 쓰지 않게 바꿨어도 파일이 남아 있으면 지우는 버튼은 보인다
-                    if (s.ytCookiesBrowser == internalBrowserCookies || s.internalCookieFile.isNotEmpty)
+                    if (s.download.ytCookiesBrowser == internalBrowserCookies || s.internalCookieFile.isNotEmpty)
                       Padding(
                         padding: const EdgeInsets.fromLTRB(16, 0, 16, 8),
                         child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
@@ -195,9 +195,9 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
                             for (final d in loginCookieDomains)
                               FilterChip(
                                 label: Text(d),
-                                selected: s.loginCookieSites.contains(d),
-                                onSelected: (on) => c.updateSettings((x) => x.loginCookieSites = [
-                                      for (final y in x.loginCookieSites) if (y != d) y,
+                                selected: s.download.loginCookieSites.contains(d),
+                                onSelected: (on) => c.updateSettings((x) => x.download.loginCookieSites = [
+                                      for (final y in x.download.loginCookieSites) if (y != d) y,
                                       if (on) d,
                                     ]),
                               ),
@@ -220,19 +220,19 @@ class _DownloadSettingsSectionState extends State<DownloadSettingsSection> {
                       title: Text(tr('동시 다운로드 수')),
                       subtitle: Text(tr('나머지는 대기했다가 차례로 받습니다')),
                       trailing: CountSelector(
-                        value: s.maxParallelDownloads,
-                        onChanged: (n) => c.updateSettings((x) => x.maxParallelDownloads = n),
+                        value: s.download.maxParallel,
+                        onChanged: (n) => c.updateSettings((x) => x.download.maxParallel = n),
                       ),
                     ),
                     settingsFolderTile(
                       title: tr('다운로드 (jj_yt-dlp · jj_aria2)'),
-                      value: s.downloadRoot,
+                      value: s.download.root,
                       defaultText: trf('{0} (기본): {1}', [desk ? tr('프로그램 폴더') : tr('내장 저장소'), s.resolvedDownloadRoot()]),
                       onPick: () async {
                         final d = await pickFolder(context, tr('다운로드 위치'), s.resolvedDownloadRoot());
-                        if (d != null) await c.updateSettings((x) => x.downloadRoot = d);
+                        if (d != null) await c.updateSettings((x) => x.download.root = d);
                       },
-                      onReset: () => c.updateSettings((x) => x.downloadRoot = null),
+                      onReset: () => c.updateSettings((x) => x.download.root = null),
                     ),
     ]);
   }
diff --git a/test/aria2_stall_test.dart b/test/aria2_stall_test.dart
index 33c886a..761c4e3 100644
--- a/test/aria2_stall_test.dart
+++ b/test/aria2_stall_test.dart
@@ -54,9 +54,9 @@ void main() {
   });
 
   test('설정: 시작되지 않으면 알리기 - 처음 60초, 모르는 값은 60', () {
-    expect(AppSettings().torrentStallSeconds, 60);
-    expect(AppSettings.fromJson({'torrentStallSeconds': 0}).torrentStallSeconds, 0);
-    expect(AppSettings.fromJson({'torrentStallSeconds': 7}).torrentStallSeconds, 60);
+    expect(AppSettings().download.torrentStallSeconds, 60);
+    expect(AppSettings.fromJson({'torrentStallSeconds': 0}).download.torrentStallSeconds, 0);
+    expect(AppSettings.fromJson({'torrentStallSeconds': 7}).download.torrentStallSeconds, 60);
   });
 
   testWidgets('멈춘 마그넷 줄: "트래커 · 피어에 닿지 않습니다" · 이유 후보 · [다시 시도] (지금 것을 지우고 새로 넣음)', (tester) async {
diff --git a/test/batch_test.dart b/test/batch_test.dart
index f2f41de..ba11977 100644
--- a/test/batch_test.dart
+++ b/test/batch_test.dart
@@ -516,7 +516,7 @@ void main() {
     File(file).writeAsStringSync('x');
 
     final d = DownloadManager(
-        backends: [_Backend()], settings: () => AppSettings()..downloadRoot = dir.path, readClipboard: () async => null);
+        backends: [_Backend()], settings: () => AppSettings()..download.root = dir.path, readClipboard: () async => null);
     final added = <String>[];
     d.addToEditList = (files) async {
       added.addAll(files);
@@ -552,11 +552,11 @@ void main() {
     tester.view.physicalSize = const Size(1500, 900);
     tester.view.devicePixelRatio = 1;
     addTearDown(tester.view.reset);
-    final s = AppSettings()..addFinishedDownloads = false;
+    final s = AppSettings()..download.addFinished = false;
     final d = DownloadManager(backends: [_Backend()], settings: () => s, readClipboard: () async => null);
     d.addToEditList = (files) async => files.length;
     d.setAutoAdd = (on) async {
-      s.addFinishedDownloads = on;
+      s.download.addFinished = on;
       d.refresh();
     };
     final t = d.addPage('https://vimeo.com/1')!..title = '영상';
@@ -567,7 +567,7 @@ void main() {
     expect(box().value, isFalse);
     await tester.tap(find.text('완료 시 자동 동영상 추가'));
     await tester.pump();
-    expect(s.addFinishedDownloads, isTrue);
+    expect(s.download.addFinished, isTrue);
     expect(box().value, isTrue);
 
     // 다 받으면 목록에서 뺀다 (앱이 onFinished 에서 부름)
@@ -593,7 +593,7 @@ void main() {
         final d = DownloadManager(backends: [_Backend()], settings: () => s, readClipboard: () async => null);
         addTearDown(d.dispose);
         d.addToEditList = (files) async => files.length;
-        d.setAutoAdd = (on) async => s.addFinishedDownloads = on;
+        d.setAutoAdd = (on) async => s.download.addFinished = on;
         d.addPage('https://vimeo.com/1')!.title = '영상';
         await tester.pumpWidget(MaterialApp(home: DownloadsPage(d: d)));
         await tester.pump();
diff --git a/test/browser_test.dart b/test/browser_test.dart
index 18deb1f..81aba13 100644
--- a/test/browser_test.dart
+++ b/test/browser_test.dart
@@ -187,7 +187,7 @@ void main() {
       expect(isCookieReadError('ERROR: Failed to decrypt with DPAPI. See cookies issue'), isTrue);
       expect(isCookieReadError('ERROR: Video unavailable'), isFalse);
       expect(ytDlpCookieArgs(browser: internalBrowserCookies), isEmpty); // 아직 로그인 전
-      expect(AppSettings().ytCookiesBrowser, internalBrowserCookies); // 새 설치 기본값
+      expect(AppSettings().download.ytCookiesBrowser, internalBrowserCookies); // 새 설치 기본값
     });
     test('cookies.txt 형식 (HttpOnly · 중복 제거 · 쿠키 파일 우선)', () {
       final txt = toNetscapeCookies(const [
@@ -208,7 +208,7 @@ void main() {
 
     test('브라우저 페이지 받기 (YouTube 외 사이트도)', () {
       final v = _Backend(DownloadKind.video);
-      final d = DownloadManager(backends: [v], settings: () => AppSettings()..downloadRoot = r'D:\dl');
+      final d = DownloadManager(backends: [v], settings: () => AppSettings()..download.root = r'D:\dl');
       expect(d.addPage('https://vimeo.com/12345')!.kind, DownloadKind.video);
       expect(d.addPage('https://vimeo.com/12345'), isNull); // 이미 받는 중
       expect(d.addPage('about:blank'), isNull);
@@ -218,7 +218,7 @@ void main() {
 
     test('다 받은 영상 → 편집 목록 알림 (한 번만, 조각 파일 제외)', () async {
       final v = _Backend(DownloadKind.video);
-      final d = DownloadManager(backends: [v], settings: () => AppSettings()..downloadRoot = r'D:\dl');
+      final d = DownloadManager(backends: [v], settings: () => AppSettings()..download.root = r'D:\dl');
       final got = <String>[];
       d.onFinished.listen((t) => got.add(t.id));
       final t = d.addPage('https://vimeo.com/1')!;
diff --git a/test/cleanup_test.dart b/test/cleanup_test.dart
index 9812c9d..9823caa 100644
--- a/test/cleanup_test.dart
+++ b/test/cleanup_test.dart
@@ -56,7 +56,7 @@ void main() {
       storage: _Storage(tmp),
       models: ModelStore(models),
     ));
-    c.settings.downloadRoot = p.join(root.path, 'dl');
+    c.settings.download.root = p.join(root.path, 'dl');
     c.logFile = p.join(logs, 'app.log');
 
     // 지울 것
diff --git a/test/download_test.dart b/test/download_test.dart
index 7528ea0..ba0e5c9 100644
--- a/test/download_test.dart
+++ b/test/download_test.dart
@@ -137,18 +137,18 @@ https://example.com/page.html
     final dir = Directory.systemTemp.createTempSync('jj_set_');
     addTearDown(() => dir.deleteSync(recursive: true));
     final store = SettingsStore(p.join(dir.path, 'settings.json'));
-    expect((await store.load()).clipboardWatch, isTrue); // 파일 없으면 기본값
+    expect((await store.load()).download.clipboardWatch, isTrue); // 파일 없으면 기본값
     final s = AppSettings()
       ..mkvOutputRoot = r'D:\out'
-      ..downloadRoot = r'D:\dl'
-      ..clipboardWatch = false
+      ..download.root = r'D:\dl'
+      ..download.clipboardWatch = false
       ..showHotkey = 'Alt+F9'
       ..askAiOptions = false
       ..encode = const EncodeSettings(codec: VideoCodecChoice.vp9, resolution: ResolutionChoice.p720)
       ..aiTargets = ['ko', 'fr'];
     await store.save(s);
     final l = await store.load();
-    expect([l.mkvOutputRoot, l.downloadRoot, l.clipboardWatch, l.showHotkey, l.askAiOptions],
+    expect([l.mkvOutputRoot, l.download.root, l.download.clipboardWatch, l.showHotkey, l.askAiOptions],
         [r'D:\out', r'D:\dl', false, 'Alt+F9', false]);
     expect(l.encode.codec, VideoCodecChoice.vp9);
     expect(l.encode.resolution, ResolutionChoice.p720);
@@ -166,7 +166,7 @@ https://example.com/page.html
     setUp(() {
       video = _FakeBackend(DownloadKind.video);
       torrent = _FakeBackend(DownloadKind.torrent);
-      settings = AppSettings()..downloadRoot = r'D:\dl';
+      settings = AppSettings()..download.root = r'D:\dl';
       clip = 'https://youtu.be/already-there';
       d = DownloadManager(
           backends: [video, torrent], settings: () => settings, readClipboard: () async => clip);
@@ -193,7 +193,7 @@ https://example.com/page.html
       expect(video.started, ['https://www.youtube.com/watch?v=AAA111']);
       expect(torrent.started, hasLength(1));
 
-      settings.clipboardWatch = false;
+      settings.download.clipboardWatch = false;
       clip = 'https://youtu.be/BBB222';
       expect(await d.checkClipboard(), isEmpty);
     });
diff --git a/test/downloads_ui_test.dart b/test/downloads_ui_test.dart
index f146f53..eb46e68 100644
--- a/test/downloads_ui_test.dart
+++ b/test/downloads_ui_test.dart
@@ -45,7 +45,7 @@ class _Quiet extends _Backend {
 void main() {
   DownloadManager make() => DownloadManager(
         backends: [_Backend(DownloadKind.video), _Backend(DownloadKind.torrent)],
-        settings: () => AppSettings()..downloadRoot = r'D:\dl',
+        settings: () => AppSettings()..download.root = r'D:\dl',
         readClipboard: () async => null,
       );
 
@@ -213,7 +213,7 @@ void main() {
     addTearDown(tester.view.reset);
     final d = DownloadManager(
       backends: [_Quiet(DownloadKind.video), _Quiet(DownloadKind.torrent)],
-      settings: () => AppSettings()..downloadRoot = r'D:\dl',
+      settings: () => AppSettings()..download.root = r'D:\dl',
       readClipboard: () async => null,
     );
     await tester.pumpWidget(MaterialApp(home: DownloadsPage(d: d)));
diff --git a/test/queue_test.dart b/test/queue_test.dart
index 86b50fb..34e48f5 100644
--- a/test/queue_test.dart
+++ b/test/queue_test.dart
@@ -113,8 +113,8 @@ void main() {
     setUp(() {
       video = _Backend(DownloadKind.video);
       settings = AppSettings()
-        ..downloadRoot = r'D:\dl'
-        ..maxParallelDownloads = 2;
+        ..download.root = r'D:\dl'
+        ..download.maxParallel = 2;
       d = DownloadManager(backends: [video], settings: () => settings, readClipboard: () async => null);
     });
     tearDown(() => d.dispose());
@@ -132,7 +132,7 @@ void main() {
       expect(ts[3].state, DownloadState.downloading);
       await d.resume([ts[1]]);
       expect(ts[1].state, DownloadState.queued);
-      settings.maxParallelDownloads = 0; // 무한
+      settings.download.maxParallel = 0; // 무한
       await d.resume(const []);
       expect(ts.where((t) => t.state == DownloadState.downloading), hasLength(4));
     });
@@ -153,7 +153,7 @@ void main() {
       expect(d.tasks.first.dir, p.join(r'D:\dl', 'jj_yt-dlp', 'My Playlist'));
       expect(d.tasks.contains(holder), isFalse);
 
-      settings.ytExpandPlaylists = false;
+      settings.download.ytExpandPlaylists = false;
       final single = d.add('https://www.youtube.com/watch?v=z&list=PLother')!;
       expect(single.expanding, isFalse);
     });
diff --git a/test/security_bits_test.dart b/test/security_bits_test.dart
index 7c9d714..99d9890 100644
--- a/test/security_bits_test.dart
+++ b/test/security_bits_test.dart
@@ -95,15 +95,15 @@ void main() {
     });
 
     test('고른 사이트의 쿠키만 넘긴다 (처음은 모두)', () {
-      expect(AppSettings().loginCookieSites, loginCookieDomains);
+      expect(AppSettings().download.loginCookieSites, loginCookieDomains);
       expect(isLoginCookieDomain('.instagram.com'), isTrue);
       CookieExport.sites = ['youtube.com', 'google.com'];
       expect(isLoginCookieDomain('.youtube.com'), isTrue);
       expect(isLoginCookieDomain('.instagram.com'), isFalse);
       expect(isLoginCookieDomain('netflix.com'), isFalse);
-      final b = AppSettings.fromJson((AppSettings()..loginCookieSites = ['x.com']).toJson());
-      expect(b.loginCookieSites, ['x.com']);
-      expect(AppSettings.fromJson({'loginCookieSites': ['x.com', 'evil.com']}).loginCookieSites, ['x.com']);
+      final b = AppSettings.fromJson((AppSettings()..download.loginCookieSites = ['x.com']).toJson());
+      expect(b.download.loginCookieSites, ['x.com']);
+      expect(AppSettings.fromJson({'loginCookieSites': ['x.com', 'evil.com']}).download.loginCookieSites, ['x.com']);
     });
 
     test('앱 안 브라우저 쿠키를 쓰던 사람에게 넘기는 사이트가 넓어진 것을 한 번 알린다', () {
diff --git a/test/small_items_test.dart b/test/small_items_test.dart
index 889f359..9100a01 100644
--- a/test/small_items_test.dart
+++ b/test/small_items_test.dart
@@ -33,9 +33,9 @@ void main() {
   });
 
   test('36: 같은 화질이면 H.264 먼저 - 설정 (PC 기본 꺼짐) · yt-dlp 인수', () {
-    expect(AppSettings.fromJson({}).ytPreferH264, isFalse); // 시험은 PC (Android 는 기본 켜짐)
-    expect(AppSettings.fromJson({'ytPreferH264': true}).ytPreferH264, isTrue);
-    expect(AppSettings.fromJson((AppSettings()..ytPreferH264 = true).toJson()).ytPreferH264, isTrue);
+    expect(AppSettings.fromJson({}).download.ytPreferH264, isFalse); // 시험은 PC (Android 는 기본 켜짐)
+    expect(AppSettings.fromJson({'ytPreferH264': true}).download.ytPreferH264, isTrue);
+    expect(AppSettings.fromJson((AppSettings()..download.ytPreferH264 = true).toJson()).download.ytPreferH264, isTrue);
     expect(ytDlpFormatArgs(YtContainer.mp4, YtQuality.best, preferH264: true).join(' '), contains('vcodec:h264'));
     expect(ytDlpFormatArgs(YtContainer.mp4, YtQuality.best).join(' '), isNot(contains('vcodec:h264')));
   });