I am looking for advice on if it is a good idea to use the PROMISE Pegasus R4 4TB RAID System for general storage of media and back ups or if it can be done at all. At first I was thinking about just buying a HDD Bay with 5 or 6 slots and using my older 5400rpm drives via firewire. I have about 4 drives to consolidate. But then I saw this and I read a little on what a raid system does, and still don't fully understand it. Basically I am wondering if this can just be used as a huge external since it is the biggest option that supports thunderbolt. Second, if I am running dual monitors or even 1 monitor, can I plug this into the back of the TB Display or does it have to be plugged into my MBP? For advice I am not looking for anything eSATA or SATA, and have no option given my 15" MBP. But I would love some feedback as to if this is a good idea or will work at all. I am not worried about the price. I have been saving for a while to get dual TB displays and hopefully this 4TB RAID system.