Backup retention

Is there a way to limit the number of days the backups are retained on the network folder? I have a Barracuda Backup appliance backing up the backups from the network drive and only need like a weeks worth on the share at a time.

I am running version LEM 6.3.1. I am backing up to a Windows 2012 R2 network share. Then the Barracuda backs the network share nightly.

Thank you