A storage apparatus includes a second volume which stores data serving as a copying source of data to be stored in a first volume, serving as a data copying destination in another storage apparatus, a session establishing unit which establishes a session between the second volume and the first volume, and a copy directing unit which directs a volume, including a free area, in the other storage apparatus such that data equivalent to the data to be stored in the first volume is copied, in response to a copy setting command issued by a server.