When image data recorded in a recording medium by a digital camera are sent to a data storing apparatus and stored therein, the image data can be classified according to a user or a digital camera. The image data are recorded in the recording medium by photography with the digital camera. In the case where free space of the recording medium has been consumed, the image data are sent to a DPE store via a mobile phone and stored in a server therein. A controller of the digital camera 1 adds ID information such as user ID or digital camera ID to the image data at the time of transfer of the image data. The DPE store stores the image data by classifying the image data in a user directory in the server according to the ID information added to the image data.