Qnap Network Storage Server (TS-219PII-US) Cross-platform Data Sharing Center Complete Backup Solutions Revolutionary Home Video, Music & Photo Center QMobile App for On-the-go Contents Access Superior Performance with 2.0 GHz CPU Qnap 2-bay iSCSI NAS, Hot-swappable Marvell 2.0GHz CPU, 512MB DDRII RAM Two USB 3.0 ports at the back and one USB 2.0 at the front