Lenovo offers its Lenovo F360 500GB Portable USB 2.0 External 2.5" Hard Drive in Black, model no. 57Y6685, for $149.99. Coupon code "USP1A36685" drops it to $67.50. With free shipping, that's $0.13/GB and the lowest total price we could find by $22. (It's also the least expensive 500GB portable HDD we've seen since October.) It features USB 2.0 connectivity, is self-powered, drag-and-drop file transfer, and more. Coupon expires April 16.