RDS Snapshot Retention

For cloud-native snapshots and snapshot replicas, the backup appliance retains the number of latest restore points defined in backup scheduling settings.

During every successful backup session, the backup appliance creates a new restore point. If the backup appliance detects that the number of restore points in the snapshot chain exceeds the retention limit, the earliest restore point is removed from the chain. For more information on the snapshot deletion process, see AWS Documentation.