You can perform a full backup operation or an incremental backup operation of a RDS for PostgreSQL database group.
From the navigation pane, go to Protect > Databases.
The Instances page appears.
Click the instance.
The instance page appears.
The DumpBasedBackupSet page appears.
In the Database groups table, click the database group that you want to back up.
The database group page appears.
The Select backup level dialog box appears.
Under Backup level, select Full.