Setting information in which a sequence with medical meaning is set as the sequence of viewing a plurality of medical image data is read from a portable medium. Moreover, in accordance with the sequence set in the setting information, a plurality of medical image data stored in the portable medium is replicated into a storage unit of a terminal device as replicated medical image data. Furthermore, before replication of all of the medical image data stored in the portable medium is finished, reception of an output instruction is started. Replicated medical image data corresponding to medical image data specified in the output instruction is then output to an output unit.