Storage system and backup method for storage system

A backup method for a storage system including a processor and a storage device and holding data to be backed up, the storage system being connected, via a network, to a storage management server and a cloud storage device capable of storing backup data obtained by backup, the backup method comprising:

• a schedule setting step of a scheduler, when receiving a setting of periodic backup including at least a backup frequency for the data of the storage system from the storage management server, setting a schedule including a time-point for the periodic backup;
• a backup step of a backup unit periodically creating backup data according to the time-point in the schedule set by the scheduler;
• and
• a data transfer step of a data transfer unit transferring the created backup data to the cloud storage device according to the time-point in the schedule set by the scheduler.