An error occurred while configuring the backup policy. Ensure all the hard drives chosen for the backup destination are connected, ...

An error occurred while configuring the backup policy. Ensure all the hard drives chosen for the backup destination are connected, or exclude those backup drives that are offline. Also, ensure all the hard drives that are to be backed up are connected to the server, powered on and writable, and then try again. If the problem persists, check for storage related alerts.