An operation input portion 7, a buffer memory 8, a record medium 9, and a single USB controller 10 are connected to a bus connected to a controlling microcomputer 6. A USB connector 11 is connected to the USB controller 10. The USB controller 10 as hardware deals with a single interface. By a process of the controlling microcomputer 6, data is transferred from the buffer memory 8 to the USB controller 10 through one of USB interfaces corresponding to PTP and mass storage class interface. With a switch of the operation input portion 7 and a menu screen, the user sets a USB interface. Selection information representing the selected USB interface is stored in a memory of the controlling microcomputer 6.