I have three 1TB hard drives that are in my mac pro and they're filled with media. I need to expand my storage space so I'm looking to move those hard drives out of the mac pro, and into a storage tower where I could also have other hard drives. I'd then connect this tower to my mac pro (obviously). I know some people would recommend drobo, however I do not need to back up this data so I don't want to pay extra for that luxury, plus it only has four slots, and i'd like to have more hard drives than that- but it's not necessary. I could probably just do with 1 more TB.