I would appreciate any feedback on compatibility and external hard drives y'all have used for backing up macbook pros. I have a 1 TB laptop and would prefer to use the same external HD for some time to come. I'm looking at 4TB portables and of course would love to find a unit that will be reliable in every way an not malfunction in a years time (like my ReadyNAS server grrrr . Basically I've given up on using this server and I just want a portable unit- my 500 g one is already full. Any help appreciated !!!