Lenovo offers the Lenovo 500GB F360 Portable External Hard Drive in Black (pictured), model no. 57Y6685, for $149.99. Coupon code "USP1MA426685" cuts it to $50.99. With free shipping, that's $0.10/GB, tied with our February mention, and the lowest total price we could find by $31. It's USB powered and doesn't require an external power source. Coupon expires May 15.