WL 6TB 5700RPM 64MB Cache 5700RPM SATA III (6.0Gb/s) 3.5" Internal Hard Drive (Desktop PC, CCTV DVR, NAS) - w/1 Year Warranty Capacity: 6 TB Interface Type: SATA 6.0Gb/s Rotation Speed: 5700RPM Buffer Size: 64MB Cache Warranty: 1 Year