Click the Storage tab, then select Disks.
On the screen that appears, click the Actions button next to the disk you want to back up, then select Schedule for Backups.
Click the Edit icon next to a schedule to change its details.
Specify schedule details:
Click the Save button to finish.
Note: Despite the input value, for normal backups (when Disk is the target), the rotation period is always 1. Thus, only 1 normal auto-backup with a specific frequency, period, and target will be stored in the system.