diff --git a/lib/helpers/api_helper.dart b/lib/helpers/api_helper.dart
index 41668be..f5d61f7 100644
--- a/lib/helpers/api_helper.dart
+++ b/lib/helpers/api_helper.dart
@@ -60,17 +60,6 @@ class APIHelper {
                 contentType: v.type,
               )));
         }
-
-        // Process picked files
-        for (final key in request.pickedFiles.keys) {
-          var v = request.pickedFiles[key];
-          data.files.add(MapEntry(
-              key,
-              MultipartFile.fromBytes(
-                await v.readAsBytes(),
-                filename: v.path.split("/").last,
-              )));
-        }
       }
 
       // Execute the request
diff --git a/lib/helpers/comments_helper.dart b/lib/helpers/comments_helper.dart
index d42372a..2903165 100644
--- a/lib/helpers/comments_helper.dart
+++ b/lib/helpers/comments_helper.dart
@@ -17,7 +17,7 @@ class CommentsHelper {
       "content": comment.hasContent ? comment.content : "",
     });
 
-    if (comment.hasImage) request.addPickedFile("image", comment.image);
+    if (comment.hasImage) request.addBytesFile("image", comment.image);
 
     final response = await request.execWithFiles();
 
diff --git a/lib/helpers/posts_helper.dart b/lib/helpers/posts_helper.dart
index 7d598bf..f951963 100644
--- a/lib/helpers/posts_helper.dart
+++ b/lib/helpers/posts_helper.dart
@@ -142,7 +142,7 @@ class PostsHelper {
         break;
 
       case PostKind.IMAGE:
-        request.addPickedFile("image", post.image);
+        request.addBytesFile("image", post.image);
         break;
 
       case PostKind.WEB_LINK:
diff --git a/lib/helpers/settings_helper.dart b/lib/helpers/settings_helper.dart
index f6f429a..16dfa1f 100644
--- a/lib/helpers/settings_helper.dart
+++ b/lib/helpers/settings_helper.dart
@@ -5,7 +5,8 @@ import 'package:comunic/models/data_conservation_policy_settings.dart';
 import 'package:comunic/models/general_settings.dart';
 import 'package:comunic/models/new_emoji.dart';
 import 'package:comunic/models/security_settings.dart';
-import 'package:image_picker/image_picker.dart';
+
+import '../models/api_request.dart';
 
 /// Settings helper
 ///
@@ -92,11 +93,10 @@ class SettingsHelper {
   }
 
   /// Upload a new account image
-  static Future<bool> uploadAccountImage(PickedFile newImage) async =>
-      (await APIRequest(uri: "settings/upload_account_image", needLogin: true)
-              .addPickedFile("picture", newImage)
-              .execWithFiles())
-          .isOK;
+  static Future<void> uploadAccountImage(BytesFile newImage) async =>
+      await APIRequest(uri: "settings/upload_account_image", needLogin: true)
+          .addBytesFile("picture", newImage)
+          .execWithFilesAndThrow();
 
   /// Upload a new account image from memory
   static Future<bool> uploadAccountImageFromMemory(List<int> bytes) async =>
@@ -128,13 +128,12 @@ class SettingsHelper {
 
   /// Upload a new custom emoji
   static Future<void> uploadNewCustomEmoji(NewEmoji newEmoji) async =>
-      (await APIRequest(
-                  uri: "settings/upload_custom_emoji",
-                  needLogin: true,
-                  args: {"shortcut": newEmoji.shortcut})
-              .addPickedFile("image", newEmoji.image)
-              .execWithFiles())
-          .assertOk();
+      await APIRequest(
+              uri: "settings/upload_custom_emoji",
+              needLogin: true,
+              args: {"shortcut": newEmoji.shortcut})
+          .addBytesFile("image", newEmoji.image)
+          .execWithFilesAndThrow();
 
   /// Delete a custom emoji
   ///
@@ -220,7 +219,8 @@ class SettingsHelper {
   /// Throws in case of failure
   static Future<void> setDataConservationPolicy(
       String password, DataConservationPolicySettings newSettings) async {
-    await APIRequest(uri: "settings/set_data_conservation_policy", needLogin: true)
+    await APIRequest(
+            uri: "settings/set_data_conservation_policy", needLogin: true)
         .addString("password", password)
         .addInt("inactive_account_lifetime",
             newSettings.inactiveAccountLifeTime ?? 0)
diff --git a/lib/models/api_request.dart b/lib/models/api_request.dart
index 72b5d3d..9a54015 100644
--- a/lib/models/api_request.dart
+++ b/lib/models/api_request.dart
@@ -4,7 +4,6 @@ import 'package:comunic/helpers/api_helper.dart';
 import 'package:comunic/models/api_response.dart';
 import 'package:dio/dio.dart';
 import 'package:http_parser/http_parser.dart';
-import 'package:image_picker/image_picker.dart';
 import 'package:meta/meta.dart';
 
 /// API Request model
@@ -32,7 +31,6 @@ class APIRequest {
   CancelToken cancelToken;
   Map<String, String> args;
   Map<String, File> files = Map();
-  Map<String, PickedFile> pickedFiles = Map();
   Map<String, BytesFile> bytesFiles = Map();
 
   APIRequest({@required this.uri, this.needLogin = false, this.args})
@@ -73,11 +71,6 @@ class APIRequest {
     return this;
   }
 
-  APIRequest addPickedFile(String name, PickedFile file) {
-    pickedFiles[name] = file;
-    return this;
-  }
-
   APIRequest addBytesFile(String name, BytesFile file) {
     this.bytesFiles[name] = file;
     return this;
diff --git a/lib/models/new_comment.dart b/lib/models/new_comment.dart
index 4b2542f..9d86d26 100644
--- a/lib/models/new_comment.dart
+++ b/lib/models/new_comment.dart
@@ -1,6 +1,7 @@
-import 'package:image_picker/image_picker.dart';
 import 'package:meta/meta.dart';
 
+import 'api_request.dart';
+
 /// New comment information
 ///
 /// @author Pierre HUBERT
@@ -8,7 +9,7 @@ import 'package:meta/meta.dart';
 class NewComment {
   final int postID;
   final String content;
-  final PickedFile image;
+  final BytesFile image;
 
   const NewComment({
     @required this.postID,
diff --git a/lib/models/new_emoji.dart b/lib/models/new_emoji.dart
index 363d761..db6822f 100644
--- a/lib/models/new_emoji.dart
+++ b/lib/models/new_emoji.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
-import 'package:image_picker/image_picker.dart';
+
+import 'api_request.dart';
 
 /// New emoji information
 ///
@@ -7,7 +8,7 @@ import 'package:image_picker/image_picker.dart';
 
 class NewEmoji {
   final String shortcut;
-  final PickedFile image;
+  final BytesFile image;
 
   const NewEmoji({
     @required this.shortcut,
diff --git a/lib/models/new_post.dart b/lib/models/new_post.dart
index 91deb27..4f3dd64 100644
--- a/lib/models/new_post.dart
+++ b/lib/models/new_post.dart
@@ -1,9 +1,10 @@
 import 'package:comunic/enums/post_kind.dart';
 import 'package:comunic/enums/post_target.dart';
 import 'package:comunic/enums/post_visibility_level.dart';
-import 'package:image_picker/image_picker.dart';
 import 'package:meta/meta.dart';
 
+import 'api_request.dart';
+
 /// New post information
 ///
 /// @author Pierre HUBERT
@@ -27,7 +28,7 @@ class NewPost {
   final int targetID;
   final PostVisibilityLevel visibility;
   final String content;
-  final PickedFile image;
+  final BytesFile image;
   final String url;
   final List<int> pdf;
   final PostKind kind;
diff --git a/lib/ui/routes/settings/account_image_settings.dart b/lib/ui/routes/settings/account_image_settings.dart
index ab5d7df..33c6817 100644
--- a/lib/ui/routes/settings/account_image_settings.dart
+++ b/lib/ui/routes/settings/account_image_settings.dart
@@ -15,6 +15,9 @@ import 'package:identicon/identicon.dart';
 import 'package:random_string/random_string.dart';
 import 'package:settings_ui/settings_ui.dart';
 
+import '../../../utils/log_utils.dart';
+import '../../../utils/ui_utils.dart';
+
 /// Account image settings section
 ///
 /// @author Pierre Hubert
@@ -156,15 +159,16 @@ class _AccountImageSettingsScreenState
 
   /// Upload a new account image
   void _uploadAccountImage() async {
-    final image = await pickImage(context);
+    try {
+      final image = await pickImage(context);
 
-    if (image == null) return;
+      if (image == null) return;
 
-    if (!await SettingsHelper.uploadAccountImage(image)) {
-      showSimpleSnack(context, tr("Could not upload your account image!"));
-      return;
+      await SettingsHelper.uploadAccountImage(image);
+    } catch (e, s) {
+      logError(e, s);
+      snack(context, tr("Failed to upload new account image!"));
     }
-
     _key.currentState.refresh();
   }
 
diff --git a/lib/ui/routes/settings/custom_emojies_account_settings.dart b/lib/ui/routes/settings/custom_emojies_account_settings.dart
index cb1b5e2..d7a5232 100644
--- a/lib/ui/routes/settings/custom_emojies_account_settings.dart
+++ b/lib/ui/routes/settings/custom_emojies_account_settings.dart
@@ -12,7 +12,9 @@ import 'package:comunic/utils/input_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
-import 'package:image_picker/image_picker.dart';
+
+import '../../../models/api_request.dart';
+import '../../../utils/ui_utils.dart';
 
 /// Emojies account settings
 ///
@@ -136,7 +138,7 @@ class _NewCustomEmojiDialog extends StatefulWidget {
 
 class _NewCustomEmojiDialogState extends State<_NewCustomEmojiDialog> {
   final _controller = TextEditingController();
-  PickedFile _file;
+  BytesFile _file;
 
   bool get _hasImage => _file != null;
 
@@ -209,6 +211,7 @@ class _NewCustomEmojiDialogState extends State<_NewCustomEmojiDialog> {
       });
     } catch (e, stack) {
       print("Could not pick an image! $e\n$stack");
+      snack(context, tr("Failed to pick an image!"));
     }
   }
 }
diff --git a/lib/ui/screens/group_settings_screen.dart b/lib/ui/screens/group_settings_screen.dart
index 4cf2429..8d7438d 100644
--- a/lib/ui/screens/group_settings_screen.dart
+++ b/lib/ui/screens/group_settings_screen.dart
@@ -259,19 +259,19 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
         // Upload a new logo
         SettingsTile(
           title: tr("Upload a new logo"),
-          onPressed: (_) => _uploadNewLogo,
+          onPressed: (_) => _uploadNewLogo(),
         ),
 
         // Generate a new random logo
         SettingsTile(
           title: tr("Generate a new random logo"),
-          onPressed: (_) => _generateRandomLogo,
+          onPressed: (_) => _generateRandomLogo(),
         ),
 
         // Delete current logo
         SettingsTile(
           title: tr("Delete logo"),
-          onPressed: (_) => _deleteLogo,
+          onPressed: (_) => _deleteLogo(),
         ),
       ],
     );
@@ -281,8 +281,8 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
   void _uploadNewLogo() async {
     try {
       final logo = await pickImage(context);
-      final bytes = await logo.readAsBytes();
-      await _doUploadLogo(bytes);
+      if (logo == null) return;
+      await _doUploadLogo(logo.bytes);
     } catch (e, stack) {
       print("Could not upload new logo! $e\n$stack");
       showSimpleSnack(context, tr("Could not upload new logo!"));
@@ -328,7 +328,7 @@ class _GroupSettingsScreenState extends SafeState<GroupSettingsScreen> {
       tiles: [
         SettingsTile(
           title: tr("Delete group"),
-          onPressed: (_) => _deleteGroup,
+          onPressed: (_) => _deleteGroup(),
         ),
       ],
     );
diff --git a/lib/ui/tiles/post_tile.dart b/lib/ui/tiles/post_tile.dart
index 2a54ca7..f7c9b59 100644
--- a/lib/ui/tiles/post_tile.dart
+++ b/lib/ui/tiles/post_tile.dart
@@ -26,9 +26,11 @@ import 'package:comunic/utils/post_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:image_picker/image_picker.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+import '../../models/api_request.dart';
+import '../../utils/log_utils.dart';
+
 /// Single posts tile
 ///
 /// @author Pierre HUBERT
@@ -77,7 +79,7 @@ class _PostTileState extends State<PostTile> {
 
   // Class members
   TextEditingController _commentController = TextEditingController();
-  PickedFile _commentImage;
+  BytesFile _commentImage;
   bool _submitting = false;
   int _maxNumberOfCommentToShow = 10;
 
@@ -493,11 +495,16 @@ class _PostTileState extends State<PostTile> {
       return;
     }
 
-    // Pick a new image
-    final newImage = await pickImage(context);
-    setState(() {
-      _commentImage = newImage;
-    });
+    try {
+      // Pick a new image
+      final newImage = await pickImage(context);
+      setState(() {
+        _commentImage = newImage;
+      });
+    } catch (e, s) {
+      logError(e, s);
+      snack(context, tr("Failed to choose an image!"));
+    }
   }
 
   /// Submit comment entered by the user
diff --git a/lib/ui/widgets/post_create_form_widget.dart b/lib/ui/widgets/post_create_form_widget.dart
index 2b5ba53..4025e55 100644
--- a/lib/ui/widgets/post_create_form_widget.dart
+++ b/lib/ui/widgets/post_create_form_widget.dart
@@ -13,7 +13,10 @@ import 'package:comunic/utils/post_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
-import 'package:image_picker/image_picker.dart';
+
+import '../../models/api_request.dart';
+import '../../utils/log_utils.dart';
+import '../../utils/ui_utils.dart';
 
 /// Widget that allows to create posts
 ///
@@ -48,7 +51,7 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
   bool _isCreating = false;
   final TextEditingController _postTextController = TextEditingController();
   PostVisibilityLevel _postVisibilityLevel;
-  PickedFile _postImage;
+  BytesFile _postImage;
   String _postURL;
   List<int> _postPDF;
   DateTime _timeEnd;
@@ -239,15 +242,20 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
 
   /// Pick an image for the new post
   Future<void> _pickImageForPost() async {
-    final image = await pickImage(context);
+    try {
+      final image = await pickImage(context);
 
-    if (image == null) return;
+      if (image == null) return;
 
-    _resetPostSelection();
+      _resetPostSelection();
 
-    setState(() {
-      this._postImage = image;
-    });
+      setState(() {
+        this._postImage = image;
+      });
+    } catch (e, s) {
+      logError(e, s);
+      snack(context, tr("Failed to pick image for post!"));
+    }
   }
 
   /// Choose a new URL for the post
diff --git a/lib/utils/files_utils.dart b/lib/utils/files_utils.dart
index b9fa7fb..3e6bb8c 100644
--- a/lib/utils/files_utils.dart
+++ b/lib/utils/files_utils.dart
@@ -1,54 +1,27 @@
 import 'dart:io';
 
-import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
-import 'package:image_picker/image_picker.dart';
 import 'package:path/path.dart' as path;
 import 'package:path_provider/path_provider.dart';
 import 'package:random_string/random_string.dart';
 
+import '../models/api_request.dart';
+import '../ui/dialogs/pick_file_dialog.dart';
+
 /// Files utilities
 ///
 /// @author Pierre HUBERT
 
-enum _ChooseImageSource { GALLERY, CAMERA }
-
 /// Ask the user to choose an image, either from the gallery or using the camera
 ///
-/// Returns null in case of failure
-Future<PickedFile> pickImage(BuildContext context) async {
-  /// First, we ask the user to choose between image picker and camera
-  final result = await showDialog<_ChooseImageSource>(
+/// Throws an exception null in case of failure
+Future<BytesFile> pickImage(BuildContext context) async {
+  return await showPickFileDialog(
     context: context,
-    builder: (c) {
-      return AlertDialog(
-        title: Text(tr("Choose an image")),
-        actions: <Widget>[
-          //Gallery
-          TextButton(
-            onPressed: () => Navigator.pop(context, _ChooseImageSource.GALLERY),
-            child: Text(
-              tr("Image gallery").toUpperCase(),
-            ),
-          ),
-
-          // Camera
-          TextButton(
-            onPressed: () => Navigator.pop(context, _ChooseImageSource.CAMERA),
-            child: Text(
-              tr("Camera").toUpperCase(),
-            ),
-          ),
-        ],
-      );
-    },
+    allowedMimeTypes: ["image/png", "image/jpeg", "image/gif"],
+    imageMaxHeight: 10000,
+    imageMaxWidth: 10000,
   );
-
-  if (result == null) return null;
-  return await ImagePicker().getImage(
-      source: result == _ChooseImageSource.CAMERA
-          ? ImageSource.camera
-          : ImageSource.gallery);
 }
 
 /// Generate a new temporary file