Staples offers the Western Digital My Passport Essential 1TB Portable USB 3.0 External Hard Drive in Black, model no. WDBACX0010BBK, for $89.99 with free shipping ($0.09/GB). (Office Depot has it for the same price.) That’s the lowest total price we could find by $30, although it was $10 less in September. Sales tax is added where applicable. The Essential series features 256-bit hardware-based encryption, automatic backup, and WD SmartWare software.

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