Buy.com through ebay has the Seagate Backup Plus 4TB USB 3.0 Black Desktop Hard Drive, model no. STCA4000100, for $139.99 with Free Shipping for a limited time.

The Seagate Backup Plus external drive delivers high-capacity storage and automatic, continuous backup with encryption for all your files with its pre-loaded software. The included USB 3.0 plug-and-play adapter makes it easy to connect to your computer and displays the drive’s available storage capacity. The streamlined design complements any modern workspace, and as the world’s most versatile external desktop drive, you now have the ability to upgrade your connection interface to suit your needs. This drive is great for allowing you to save or access your videos, photos, music or files.