WL 3TB 7200RPM 64MB Cache SATA III 6.0Gb/s 3.5" Internal (Enterprise Grade, Heavy Duty) Hard Drive (For RAID, NAS, CCTV DVR, Desktop PC) w/1 Year Warranty 3TB 3000GB Hard Disk Drive Desktop Hard Drive, Can be White Lable or any Major Brand 64MB Cache , SATA 3, 6.0GB/s, 7200 RPM For Raid , NAS, CCTV, DVR, PC, Mac 1 Yr Warranty