Each customer has their own RDS database. In order to supply fully stable and high available services, the database is backed up routinely as follows:

• Database is backed up on a daily basis (based on AWS service and standards)
• Database is backed up before upgrades
• Each backup is encrypted with the customer’s personal KMS key
• Last 3 backups are stored for each RDS database to enable easy rollback
• Upon request, Google will provide a copy of the entire database for any customer need (i.e. regulation need).
  For data archive needs, please file a Support ticket.