Amazon offers the Western Digital My Book Essential 3TB USB 3.0 External Hard Drive, model no. WDBACW0030HBK-NESN, for $139.99 with free shipping ($0.05/GB). That’s tied with our mention from two weeks ago as the lowest total price we’ve seen for any 3TB USB 3.0 external hard drive. (It’s also a current price low for this model by $10.) 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.