Western Digital offers its factory-refurbished Western Digital 3TB MyBook Essential USB 3.0 External Hard Drive, model no. WDBFJK0030HBK-NESN, for $89.99 with free shipping. (NeweggFlash has it for the same price.) That's the lowest total price we could find for a refurb by $20, although we saw a new unit for $10 less last summer. It features a USB 3.0 interface and password protection with hardware encryption. A 6-month Western Digital warranty applies.