diff --git a/nixos/common/default.nix b/nixos/common/default.nix
index 2b53c32..c659113 100644
--- a/nixos/common/default.nix
+++ b/nixos/common/default.nix
@@ -2,4 +2,9 @@
   imports = [
     ./audio.nix
   ];
+
+  # auto mount external drives
+  services.devmon.enable = true;
+  services.gvfs.enable = true;
+  services.udisks2.enable = true;
 }
diff --git a/nixos/enoko/configuration.nix b/nixos/enoko/configuration.nix
index 5cf6689..069d918 100644
--- a/nixos/enoko/configuration.nix
+++ b/nixos/enoko/configuration.nix
@@ -60,7 +60,7 @@
     lu = {
       shell = pkgs.fish;
       isNormalUser = true;
-      extraGroups = ["wheel"];
+      extraGroups = ["wheel" "storage"];
     };
   };
 
diff --git a/nixos/yukari/configuration.nix b/nixos/yukari/configuration.nix
index d6bfbbe..231477a 100644
--- a/nixos/yukari/configuration.nix
+++ b/nixos/yukari/configuration.nix
@@ -60,7 +60,7 @@
     lu = {
       shell = pkgs.fish;
       isNormalUser = true;
-      extraGroups = ["wheel"];
+      extraGroups = ["wheel" "storage"];
     };
   };