diff --git a/backend/user/serializers.py b/backend/user/serializers.py
index e8314b98..3c89d5cb 100644
--- a/backend/user/serializers.py
+++ b/backend/user/serializers.py
@@ -37,6 +37,7 @@ class UserMeConfigSerializer(serializers.Serializer):
     view_style_playlist = serializers.ChoiceField(choices=["grid", "list"])
     grid_items = serializers.IntegerField(max_value=7, min_value=3)
     hide_watched = serializers.BooleanField()
+    file_size_unit = serializers.ChoiceField(choices=["binary", "metric"])
     show_ignored_only = serializers.BooleanField()
     show_subed_only = serializers.BooleanField()
     show_help_text = serializers.BooleanField()
diff --git a/backend/user/src/user_config.py b/backend/user/src/user_config.py
index a85ce5e3..f691e980 100644
--- a/backend/user/src/user_config.py
+++ b/backend/user/src/user_config.py
@@ -22,6 +22,7 @@ class UserConfigType(TypedDict, total=False):
     view_style_playlist: str
     grid_items: int
     hide_watched: bool
+    file_size_unit: str
     show_ignored_only: bool
     show_subed_only: bool
     show_help_text: bool
@@ -44,6 +45,7 @@ class UserConfig:
         view_style_playlist="grid",
         grid_items=3,
         hide_watched=False,
+        file_size_unit="binary",
         show_ignored_only=False,
         show_subed_only=False,
         show_help_text=True,