diff --git a/mobile/lib/presentation/widgets/action_buttons/share_action_button.widget.dart b/mobile/lib/presentation/widgets/action_buttons/share_action_button.widget.dart
index 6109b137a1..eef87f299d 100644
--- a/mobile/lib/presentation/widgets/action_buttons/share_action_button.widget.dart
+++ b/mobile/lib/presentation/widgets/action_buttons/share_action_button.widget.dart
@@ -7,7 +7,6 @@ import 'package:fluttertoast/fluttertoast.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/enums.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
-import 'package:immich_mobile/domain/models/settings_key.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/generated/translations.g.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/base_action_button.widget.dart';
@@ -129,12 +128,6 @@ class ShareActionButton extends ConsumerWidget {
       return;
     }
 
-    await ref.read(settingsProvider).write(SettingsKey.shareFileType, fileType);
-
-    if (!context.mounted) {
-      return;
-    }
-
     await _share(context, ref, fileType);
   }
 
diff --git a/mobile/test/unit/presentation/action_buttons/share_action_button_test.dart b/mobile/test/unit/presentation/action_buttons/share_action_button_test.dart
new file mode 100644
index 0000000000..2f4aa3b8c9
--- /dev/null
+++ b/mobile/test/unit/presentation/action_buttons/share_action_button_test.dart
@@ -0,0 +1,117 @@
+import 'dart:async';
+
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:immich_mobile/constants/enums.dart';
+import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
+import 'package:immich_mobile/domain/models/settings_key.dart';
+import 'package:immich_mobile/infrastructure/repositories/db.repository.dart';
+import 'package:immich_mobile/infrastructure/repositories/settings.repository.dart';
+import 'package:immich_mobile/presentation/widgets/action_buttons/base_action_button.widget.dart';
+import 'package:immich_mobile/presentation/widgets/action_buttons/share_action_button.widget.dart';
+import 'package:immich_mobile/providers/asset_viewer/asset_viewer.provider.dart';
+import 'package:immich_mobile/providers/infrastructure/action.provider.dart';
+
+import '../../factories/remote_asset_factory.dart';
+import '../presentation_context.dart';
+
+class _RecordingActionNotifier extends ActionNotifier {
+  final List<ShareAssetType> sharedFileTypes = [];
+
+  @override
+  void build() {}
+
+  @override
+  Future<ActionResult> shareAssets(
+    ActionSource source,
+    BuildContext context, {
+    ShareAssetType fileType = ShareAssetType.original,
+    Completer<void>? cancelCompleter,
+    void Function(double progress)? onAssetDownloadProgress,
+  }) async {
+    sharedFileTypes.add(fileType);
+    return const ActionResult(count: 1, success: true);
+  }
+}
+
+class _FakeAssetViewerNotifier extends AssetViewerStateNotifier {
+  final BaseAsset asset;
+
+  _FakeAssetViewerNotifier(this.asset);
+
+  @override
+  AssetViewerState build() => AssetViewerState(currentAsset: asset);
+}
+
+void main() {
+  late PresentationContext context;
+  late _RecordingActionNotifier actionNotifier;
+
+  setUpAll(() async {
+    final db = Drift(DatabaseConnection(NativeDatabase.memory(), closeStreamsSynchronously: true));
+    await SettingsRepository.ensureInitialized(db);
+  });
+
+  setUp(() async {
+    context = await PresentationContext.create();
+    actionNotifier = _RecordingActionNotifier();
+    await SettingsRepository.instance.clear([SettingsKey.shareFileType]);
+  });
+
+  tearDown(() {
+    context.dispose();
+  });
+
+  Future<void> pumpShareButton(WidgetTester tester) async {
+    final asset = RemoteAssetFactory.create(ownerId: context.currentUser.id);
+    await tester.pumpTestWidget(
+      context,
+      const ShareActionButton(source: ActionSource.viewer),
+      overrides: [
+        actionProvider.overrideWith(() => actionNotifier),
+        assetViewerProvider.overrideWith(() => _FakeAssetViewerNotifier(asset)),
+      ],
+    );
+  }
+
+  Future<void> longPressAndPickPreview(WidgetTester tester) async {
+    await tester.longPress(find.byType(BaseActionButton));
+    await tester.pumpAndSettle();
+    await tester.tap(find.byIcon(Icons.photo_size_select_large_rounded));
+    await tester.pumpAndSettle();
+  }
+
+  group('ShareActionButton', () {
+    testWidgets('single press shares with the configured default quality', (tester) async {
+      await pumpShareButton(tester);
+
+      await tester.tap(find.byType(BaseActionButton));
+      await tester.pumpAndSettle();
+
+      expect(actionNotifier.sharedFileTypes, [ShareAssetType.original]);
+    });
+
+    testWidgets('long press shares with the quality picked in the dialog', (tester) async {
+      await pumpShareButton(tester);
+
+      await longPressAndPickPreview(tester);
+
+      expect(actionNotifier.sharedFileTypes, [ShareAssetType.preview]);
+    });
+
+    testWidgets('quality picked on long press is a one-time choice and does not change the default', (tester) async {
+      await pumpShareButton(tester);
+
+      await longPressAndPickPreview(tester);
+      expect(actionNotifier.sharedFileTypes, [ShareAssetType.preview]);
+
+      await tester.tap(find.byType(BaseActionButton));
+      await tester.pumpAndSettle();
+
+      expect(actionNotifier.sharedFileTypes, [ShareAssetType.preview, ShareAssetType.original]);
+      expect(SettingsRepository.instance.appConfig.share.fileType, ShareAssetType.original);
+    });
+  });
+}