SEAGATE ST4000VX007 Skyhawk 4TB Surveillance Hard SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive-Frustration Free Packaging (ST4000VXZ07) Mechanical Hard Disk;

Optimized for business, enterprise, and home sercurity systems, SkyHawk hard drives deliver 4TB of powerful capacity to support up to 64 simultaneously streaming HD cameras and zero dropped frames. Built-in RV sensors help maintain performance in multi-bay systems, offering the flexibility to scale systems when more storage is needed. Lower power consumption reduces heat emissions and improves reliability-plus, drive condition can easily be monitored with SkyHawk Health Management. Enjoy long-term peace of mind with 1M hours MTBF, an included three-year limited warranty protecrtion plan, and optional Rescue Data Recovery Services.