A data control apparatus has a user interface section, an operation control section which operates based on an instruction from the user interface section, a USB device interface section which is connected to an external equipment, and controls USB communications with the external equipment, a file system control section which transfers data to and from the operation control section, and controls a file, an internal storage which stores data from the file system control section and data from the external equipment, and a USB mass storage class control section which controls a USB mass storage class, wherein the USB device interface section controls so that the external equipment identifies the data control apparatus as an external storage, and transfers to and from the external equipment.