Hi There I'm looking for an external storage bay to plug into my iMac, to back up, up to 3TB of data I'd like to be in a RAID 1 configuration that mirrors one drive to another - ideally reasonably priced, and with seamless Mac integration. This was a recommendation from a friend, so I would like it to be easy plug-and-play style with minimal configuration. Any suggestions? All the devices Im looking at on Amazon seem to have quite bad ratings. Thanks in advance!