I recently downgraded my EC2 instance. I can no longer connect to RDS. I think it might be that the internal IP is different and now the logins are attached to that specific IP. I haven't been able to figure it out. I would like to be able to get a backup from the snapshot. Is there a way to download it through AWS?
You cannot download the RDS snapshot, but you can connect to the RDS instance and export the database. If you downgrade your instance, there won’t be any effect on the connectivity unless the security groups are incorrect.