Abstract: Disclosure is to a wireless storage device capable of performing an autonomous backup. The device adopts a wireless communication technology to render a variety of access services for a wireless terminal device. For example, the storage device provides an external backup service to the connected terminal device. The device performs data packets routing for the terminal device to a network. The storage device is able to process video signals from the terminal device and broadcast video onto a display. In one embodiment, in addition to the built-in storage medium, various interfaces are disposed onto the wireless storage device to connect with many types of external storage devices. When the wireless terminal device issues a backup instruction, the wireless storage device performs backup between the medium. In particular, the backup procedure is autonomously operated in the device without occupying bandwidth between the devices as transferring the data.