Seagate surveillance hard drive is engineered for always-on recording even in harsh environments. This Seagate hard drive delivers a consistent performance. The Seagate ST4000VX007 4TB SkyHawk Surveillance Hard Drive is optimized for NVRs and DVRs. It has the capability to handle 24 x 7 video workloads. With a workload rating up to 3 times more than a desktop drive, this Seagate hard drive helps to minimize downtime and dropped frames. Furthermore, it can store hours of video footage, thanks to the 4TB capacity. This Seagate surveillance hard drive is equipped with rotational vibration sensors that maintain the consistency in performance to handle the demands of multi-drive and RAID systems.