Adorama offers the Pogoplug Series 4 Mobile Wireless Backup Device, model no. POGO-V4-A3-01, for $16.99 with free shipping. That's $3 under our Black Friday week mention and the lowest total price we've seen. (It's a current low by $7.) It provides continuous, centralized backup and features one USB port, two USB 3.0 ports, SD card, and USM/SATA slots. It is compatible with PC, Mac, iPhone, iPad, and Android.