I was thinking about getting a new internal hard drive for my new macbook since i bought the low end one with the 120gb hdd. I was looking at getting a 320gb one and installing it my self, but then i came across the western digital passport with 320gb for 130 from office depot for 20 dollars more than and internal one would be and then i would have the 320 and the 120, i dont know what to do, what would be better, thanks