To make the most of your C2 Backup storage, you can set up retention rules to have C2 Backup periodically delete unwanted versions. You can also remove devices under your account if you no longer need their backup data.

Set up retention rules

You can have C2 Backup automatically delete earlier versions to free up storage space by configuring retention rules. Once a version's retention period is up, or when the number of versions exceeds a certain amount, C2 Backup will delete the version and free up the space.
You can configure the retention rules on the Backup Policy page.

Remove devices

Another way to delete backup data is to remove the device completely from your account.

Removing a device will cause all of its data to be removed along with it, which cannot be undone.