Image data obtained by photographing an object using a camera is stored in a storage medium that can be attached to and detached from the camera. The camera includes a device program storage unit and an information writing unit. A device program that can be executed by an information processing device, which is different to the camera, is stored in the device program storage unit. The information writing unit is constituted to be capable of writing the device program to the storage medium attached to the camera. While writing the device program to the storage medium, the information writing unit writes the device program in a format enabling the information processing device to read and execute the device program automatically when the storage medium is attached to the information processing device.