Backup policies for RDS SQL Server instances can be viewed and modified. SQL Server will start automatic backup in the defined time period per day and the backup is saved for 7 days for free. Automatic backup longer than 7 days will be cleared.
**Note: As some CPU and IO resources will be used during backup, please make automatic backup at the low business peak as much as possible
You can see the backup strategy of the current instance by entering the page of "Backup Management" of "Instance Details".