Best Buy offers the Western Digital My Book Essential 2TB USB 3.0 External Hard Drive, model no. WDBACW0020HBK-NESN, for $89.99. With free shipping, that’s $0.05/GB and the lowest total price we could find by $10, although it was $16 less a month ago (since expired). 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.

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