Best_buy via Ebay offers WD - easystore 8TB External USB 3.0 Hard Drive - Black for $139.99 (orig. $179.99) with free shipping.

Product Description:
USB 3.0/2.0 interface Supports auto backup and Time Machine Mac- and PC-compatible Data transfer rates up to 5GB/sec. in USB 3.0 mode and 480MB/sec. in USB 2.0 mode NTFS formatted
Expand your PC storage with this WD easystore external desktop drive. The 8TB capacity accommodates an expanding media library, while the USB 3.0 interface offers data transfer speeds of up to 5GB/sec. for rapid file sharing. This WD easystore external desktop drive features an automatic backup software to ensure your files remain safe.