Amazon RDS DB snapshots and automated backups are stored in

s3.

A
https://aws.amazon.com/rds/faqs/
Q: Where are my automated backups and DB Snapshots stored and how do I manage their retention?

Amazon RDS DB snapshots and automated backups are stored in S3.

You can use the AWS Management Console, the ModifyDBInstance API, or the modify-db-instance command to manage the period of time your automated backups are retained by modifying the RetentionPeriod parameter. If you desire to turn off automated backups altogether, you can do so by setting the retention period to 0 (not recommended). You can manage your user-created DB Snapshots via the “Snapshots” section of the Amazon RDS Console. Alternatively, you can see a list of the user-created DB Snapshots for a given DB Instance using the DescribeDBSnapshots API or describe-db-snapshots command and delete snapshots with the DeleteDBSnapshot API or delete-db-snapshot command.