I'm at college and can't download, so i use my sisters computer in town. She has a 37GB HD on her laptop. I wan't to get a cheap 80-100 gig drive with an enclosure that i can take back and forth via usb. I'm in a dorm room and have no equip. or tools...what I'm asking is if i bought a oem drive and a case, is it plug and play? also, what kind of case is good? i was looking through newegg but didn't know which one to get.