Western Digital again offers its factory-refurbished Western Digital My Cloud 4TB NAS, model no. WDBCTL0040HWT-NESN, for $154.99 with free shipping. That's tied with our May mention and $30 under the lowest total price we could find for a new unit. It features USB 3.0, WD SmartWare Pro backup software, and password protection. A 6-month Western Digital warranty applies.