Western Digital WD Purple 4TB 3.5" Surveillance HDD 5400RPM 64MB SATA3

Western Digital WD Purple 4TB 3.5" Surveillance HDD 5400RPM 64MB SATA3 150MB/s 180TBW 24x7 64 Cameras AV NVR DVR 1.5mil MTBF 3yrs
Western Digital WD Purple 4TB 3.5" Surveillance HDD 5400RPM 64MB SATA3 150MB/s 180TBW 24x7 64 Cameras AV NVR DVR 1.5mil MTBF 3yrs