Western Digital offers the factory-refurbished Western Digital 2TB My Book Essential USB 3.0 External Hard Drive, model no. WDBAAF0020HBK-NESN, for $99.99 with free shipping ($0.05/GB). That's $42 under the lowest total price we could find for a new one, although we saw a similar refurb for $5 less in April. This drive is purported to run 3x faster than a similar USB 2.0 device when connected to a USB 3.0 port. It also features password protection with hardware encryption. A 6-month Western Digital warranty applies.