BuyDig offers the Western Digital My Book Essential 3TB USB 3.0 Desktop External Hard Drive, model no. WDBACW0030HBK-NESN, for an in-cart price of $142. Coupon code “BGSaveACool5″ drops it to $137. With free shipping, that’s $0.05/GB and the lowest total price we could find by $7. (We listed it for $3 less three weeks ago, since expired.) This drive features dual USB 3.0 and USB 2.0 compatibility and 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.