Amazon RDS Postgres database are backed up as snapshots automatically. Because of the high storage costs ($0.095 per GB-Month), I want to move them to S3 (Storage Class: Glacier Deep Archive: 0.00099 per GB-Month).
Before I proceed, I want to make sure I'm able to restore those files in S3 as a new database instance again. I can't find options to do that within AWS. So my question is this.
How to restore a RDS Postgres instance from a snapshot exported to S3?