Today only, Rakuten Shopping offers the Seagate 2TB Expansion Portable USB 3.0 External Hard Drive, model no. STBX2000401, for $86.99. Coupon code "RRRTREASURE" cuts it to $79.99. With free shipping, that's the lowest total price we could find by $10, although we saw it for $5 less two weeks ago. This drive is completely USB-powered.