B&H Photo Video offers the Western Digital Elements 3TB External USB 2.0 Hard Drive, model no. WDBAAU0030HBK-NESN, for $119 with free shipping ($0.04/GB). That's the lowest total price we could find by $11, although we saw it for $15 less a week ago with rebate hassles, since expired. Although formatted for a PC, it can be easily reformatted for a Mac.