Buy.com via Rakuten Shopping offers the Seagate 2TB Expansion Portable USB 3.0 External Hard Drive, model no. STBX2000401, for $99.99. Coupon code "527B48F" drops it to $89.99. With free shipping, that's tied with our mention from a week ago and the lowest total price we could find by $10. This drive is completely USB-powered. Coupon ends June 1.