diff --git a/types/storage.d.ts b/types/storage.d.ts
index 71271cf..fad95bb 100644
--- a/types/storage.d.ts
+++ b/types/storage.d.ts
@@ -1,4 +1,40 @@
 export interface StorageSchema {
   'app/lastRoute': string;
   'app/theme': string;
+  'storageCleaner/preferences': StorageCleanerPreferences;
+}
+
+export interface StorageCleanerPreferences {
+  autoRefresh: boolean;
+  selectedTypes: StorageCleanerOptions;
+}
+
+export interface StorageCleanerOptions {
+  localStorage: boolean;
+  sessionStorage: boolean;
+  indexedDB: boolean;
+  cookies: boolean;
+  cacheStorage: boolean;
+  serviceWorkers: boolean;
+}
+
+export type StorageCleanResult =
+  | {
+      success: true;
+      count: number;
+    }
+  | {
+      success: false;
+      error: string;
+    };
+
+export interface CleaningResult {
+  success: boolean;
+  error?: string;
+  localStorage?: StorageCleanResult;
+  sessionStorage?: StorageCleanResult;
+  indexedDB?: StorageCleanResult;
+  cookies?: StorageCleanResult;
+  cacheStorage?: StorageCleanResult;
+  serviceWorkers?: StorageCleanResult;
 }