Hi all, I've had a WD My Passport for about 2.5 years that just died on me. I essentially only use it for back-up purposes (Time Machine and a few a la carte things I do). I'm looking to replace it on a relative budget--say, $100 or less--and found: 1) refurbished 500 GB USB 2.0 for $48 2) refurbished 320GB for $45 I have an rMBP, but the space of those two is more than enough for me. I'm just looking for something basic that I won't have to think about for 2+ years. Are those good options? Is it worth getting a FireWire or USB 3.0 one? Any advice is much appreciated.