Embodiments of the present invention provide a system for backing up personal data between two mated (i.e., paired) network attached storage (NAS) devices. The system includes a local storage device and a secondary storage device that communicate over a network (e.g., the Internet) via a network connection. Any data added or modified on the local storage device will be automatically mirrored (i.e., copied) to the secondary storage device, which may be located at a secure remote site, pursuant to a data mirroring technique.