An USB device includes: a wireless communication unit; a storage unit configured for storing a driving program, a driving application, a driving command, and/or data received from an external information device and/or a server therein; and a control unit configured for controlling the wireless communication unit, the storage unit, wherein the control unit includes: a data processor configured for controlling a data processing operation using the driving program, the driving application or the driving command; and a transmission controller configured for: receiving data from the information device under control of the data processor; and selectively allowing or disallowing data transmission from the data processor to the information device.