Staples offers the Seagate 2TB Backup Plus USB 3.0 Portable Hard Drive in four colors (Silver pictured) for $79.99 with free shipping. (
Amazon charges the same in Silver and Black.) That's tied with our November mention and the best price we've seen. (It's a current low by $10.) This drive is compatible with Windows and Mac and features an 18" USB cable and pre-loaded backup software.