Definitely worth the buy. The cheapest version has 2 terabytes which is so huge. I don't know how many GB's that is but I know that it's 16 terabits. With all that space I can back up my laptop so I can put Windows on there to play more games and run different software which I've always wanted to do. If you want to buy one though you should go to an Apple store instead of a common Radioshack that will be trying to sell you the old one for less than it usually is without you knowing that the knew one is out.