I need to buy a new external drive for my Mac. Previously I had a Western Digital MyStudio on my PC, but it's formatted solely for PC and can only transfer files onto my Mac. (And also somehow between Mac and PC my music got erased.) I don't use my external drive as anything other than backup and to keep music/other things I feel bad dumping but that I don't want taking up space. I'm not playing music or movies through it constantly, I just use it to keep a backup of my docs. So since I only use it maybe 2-3 times a month, I don't need something heavy duty like what Apple sells, and I don't need something really expensive. I only need 320 gigs since that's my current harddrive on this machine and I don't intend on ever exceeding that. I was pretty happy with Western Digital, but is there a better brand for Mac? I'm looking for something in the range of $70-$110. Anyone have recommendations?