3TB 3.5" WD Mix Models SATA Desktop Internal Hard Drive PC CCTV DVR DISK.
Storage Capacity: 3TB Rotation Speed: 5400RPM, 5900RPM, 7200RPM. 3TB 3.5" WD Mixed Models SATA 7200RPM 64MB Cache. Formatted Capacity : 3TB / 3000GB. Product Type: Internal Hard Drive HDD SATA Interface: SATA II, SATA III.