For improving operability by reducing time for backup of video/audio files through a network, and also for achieving to shorten processing time, as well as, to lower a capacity of a recording medium, by inhibiting unnecessary backup, a file transmission system includes a file list obtaining portion for obtaining a list of files, which are stored in a server, a file transmission controller portion for controlling file transmission, a file transmission requesting portion for requesting a file transmission to the server, a file receiver portion for receiving the file transmitted form the server, and a client file storage portion for storing the files therein, wherein control is made on the file transmission requesting portion, so that it requests a transmission of file(s), excepting the file(s), which is/are stored in the client file storage portion, to the server, upon basis of the list.