diff --git a/src/index.ts b/src/index.ts
index f39440b..268aea8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,9 +3,14 @@ import { BrowserLocalStorage } from "./browser";
 import { NodeDirectoryStorage } from "./node";
 
 /**
- * Récupère le meilleur stockage "local" disponible
+ * Base type for storage usage
  */
-export function getLocalStorage(appname: string): KeyValueStorage {
+export type Storage = KeyValueStorage
+
+/**
+ * Get the best "local" storage available
+ */
+export function getLocalStorage(appname: string): Storage {
   try {
     return new ScopedStorage(new BrowserLocalStorage(), appname);
   } catch {
@@ -19,8 +24,8 @@ export function getLocalStorage(appname: string): KeyValueStorage {
 }
 
 /**
- * Récupère un stockage "mémoire"
+ * Get a in-memory volatile storage
  */
-export function getMemoryStorage(): KeyValueStorage {
+export function getMemoryStorage(): Storage {
   return new MemoryStorage();
 }