A copying apparatus, a computer-readable program, and a storage medium are disclosed. The copying apparatus is equipped with a reader for reading original image data, a communication interface for transmitting the read image data to a predetermined network and receiving image data from the network, and a printer engine for forming an image on a medium based on the received image data. The copying apparatus further includes storing means for storing the image data in a first data format; receiving means for receiving a request that the image data be sent to a predetermined transmission destination; data format conversion means for converting the stored image data from the first data format into a second data format; and transmitting means for transmitting the converted image data to the requested transmission destination.