Hi! I was looking into external hard drives cause I'm running a bit low of space lately. I thought it would be a snap decision on amazon ratings but... I'm not exactly looking for a very portable thing, it'll probably always be on the desk so I have more space on my mac pro, and a very fast access. 1-2TB would be more than enough. I don't even know if I could (or should) upgrade the mac pro itself? Whatever have a cheapest/reasonable ratio. Advice? Thanks!