Best Buy has the Toshiba Canvio 1.5TB Portable USB 3.0 Hard Drive Model: HDTC615XK3B1 for $69.99 with free shipping. That’s the lowest price we’ve ever seen for a 1.5TB portable USB 3 hard drive. This PC and Mac USB-powered drive features an 8MB cache and runs at 5400 rpm. . 1000+ Amazon reviewers give it 4+ stars and Best Buy readers gave it 4.5.