automatedSnapshotRetentionPeriod
The number of days that automated snapshots are retained. If the value is 0, automated snapshots are disabled. Even if automated snapshots are disabled, you can still create manual snapshots when you want with CreateClusterSnapshot.
If you decrease the automated snapshot retention period from its current value, existing automated snapshots that fall outside of the new retention period will be immediately deleted.
You can't disable automated snapshots for RA3 node types. Set the automated retention period from 1-35 days.
Default: Uses existing setting.
Constraints: Must be a value from 0 to 35.