I do a lot of video editing and need to get an external HD that will be used just for the video I'm working with. I've been looking around and Western Digital has a 500gb for $300 that's USB 2.0. Is that a solid drive? Because I really can't have this thing crash on me. Also is USB 2.0 quick enough for what I need since I'll basically be working from that driving, reading and writing to it as I work.