The need for backup and restore arises in a mobile device based system when a client application is discarded along with its historical record. In a system that provides the backup and restore capability, a server is configured with a request handler, an application storage upload/download handler, and a device storage mirror database. In a mobile device (also client), the transaction listener provides a transaction associated with memory items to the crumb sticker which, in turn, sends to the request handler a recording request with the transaction along with a request URL (uniform resource locator). The data for the recording request is channeled from the client storage to the device storage mirror database via the application storage upload/download handler. The memory items are accumulated in a file at the client and in a backup at the device storage mirror database, and are restorable to the client from the backup.