To easily know a backup state even without connection to a communication bus, the Internet or the like, when a user desires to delete a digital image file from a photographing device.

When transferring the digital image file generated from an image photographed by the photographing device A001 and recorded, and a thumb nail image thereof to a PC B001 and backing up them, and transferring the digital image file and the thumb nail image thereof transferred to the PC and stored to a backup server C001 and backing up them, a display message showing whether the digital image file and the thumb nail image thereof are recorded by only the photographing device, are transferred to the PC by a backup means and are recorded, or are transferred to the backup server and are recorded is written in the thumb nail image recorded by the photographing device.