A backup source volume is a virtual volume, a plurality of regions of the backup source volume is allocatable to the storage device. A storage control device is configured to set a backup destination volume, the backup destination volume includes a plurality of regions, store allocation information which indicates a first region of the plurality of regions of the backup source volume is allocated to the storage device and indicates a second region of the plurality of regions of the backup source volume is not allocated to the storage device, the first region and the second region corresponding to a third region and a fourth region included in the plurality of regions of the backup destination volume respectively, set the forth region free from the first data stored in the at least one storage device, and copy second data stored in the first region to the third region.