A television includes a device memory for storing a plurality of data files; an interface for connecting an external device to the television; and a detector used for detecting whether the external device is connected to the television and detecting whether the external device has files, and generating a file detected signal when the external device has files; a process module configured for detecting whether the files in the external device are the same as the files in the device memory, and outputting options for selection when the files in the external device is not the same as the files in the device memory; an input module for receiving operational inputs and generating optional selection signal when receiving the options from the process module; the process module is further configured for generating an add signal when detecting a voltage of the optional selection signal is high; an add module used for copying the files from the external device to the television based on the add signal.