WD 4TB My Cloud EX2 Ultra Network Attached Storage – NASwith 2x 2TB SATA 6Gb/s HDD NSAware 3.01 RJ 45 Port, 2 USB 3.0 Port High-performance 1.3 GHz dual-core processor for lag-free streaming.1 GB of DDR3 memory to multitask with ease. Centralized network storage and access from anywhere. Automatic file synching across all your computers. Simplified file and folder sharing. Personalized backup and multiple RAID options