Newegg via eBay offers the Seagate 2TB Backup Plus USB 3.0 Portable Hard Drive in Silver, model no. STDR2000101, or Black, model no. STDR2000100, for $69.99 with free shipping. That's $10 under last month's mention and the lowest total price we've seen. (It's also a current best by $10.) This drive is compatible with Windows and Mac and features an 18" USB cable and pre-loaded backup software.