QNAP TS-431X-2G 4-Bay NAS Enclosure - Alpine AL-212 Processor (1.70 GHz, 2 cores), 2GB DDR3L RAM (2 x 1GB, no slots free, 8GB Max), 512MB Flash Memory, Drive Interface: 4 x 3.5 inch/2.5 inch SATA Hard Drive Bays, Hot-swappable, Up to 16TB Max, Connectivity: 3 x USB 3.0 port (Front x 1, Rear x 2), 2 x Gigabit Ethernet Ports, 1 x 10GbE SFP+ Port