How Can I Have the System Automatically Delete Backups That I No Longer Need?

Log in to the CBR console and create a backup vault.
Associate resources with the vault during or after the creation.
Go to the Policies page to configure a backup policy. You are advised to set the backup execution time at off-peak hours, for example, early in the morning. Set the backup retention rule as needed. If your vault capacity is small, set a small value for the number of backups to be kept or the days that backups will be retained. Ensure that the vault has enough space to keep all backups automatically generated based on the policies before the retention rule takes effect. Or, auto backup will fail, and the quantity-based retention rule may not take effect. Retention rules are not applied to manual backups.
Apply the backup policy to your vault. The system will back up the resources associated with the vault at the specified time and keep backups based on the retention rule.

Parent topic: Policies