Drives are installed in Hard drive enclosures… I like the “dockable” ones made by Thermaltake or Roswill.Hitachi makes the best drives with the lowest failure rate Brands? Hitachi, Western Digital (Pick a color, black, red, green), Seagate (Baracudda, but not 1.5 terrabyte ones).For the serious user: DeskTop Hard Drives.If you don't have a wireless router this might be a good deal for you You can also purchase an Air Port Time Capsule It includes a wireless (Wi-Fi) Router (Airport) and an Apple external drive.The “Buffalo” brand enclosures with drives installed (Fry’s has them) are highly rated….You can find Portable Drives at Staples, Office Max, and Office Depot, etc.For the casual user: A Portable or Desktop External Hard drive.