diff --git a/app/User.php b/app/User.php
index 0db0bf7ca..896ad12d6 100644
--- a/app/User.php
+++ b/app/User.php
@@ -78,4 +78,9 @@ class User extends Authenticatable
         return $this->hasMany(UserDevice::class);
     }
 
+    public function storageUsedKey()
+    {
+        return 'profile:storage:used:' . $this->id;
+    }
+
 }