As one of its daily deals, newegg offers the Seagate Backup 1TB USB 3.0 Portable Hard Drive in Black, model no. STBU1000100, for $69.99 with free shipping. (Amazon charges the same.) That's $0.07/GB and the lowest total price we could find by $10. (It was $6 less two days ago, since expired, but that required rebate hassles.) This drive is compatible with Windows and Mac and features a USB 3.0 adapter, 18" USB 2.0 / 3.0 cable, pre-loaded backup software, and more. Deal ends today.