WESTERN DIGITAL ULTRA 10TB 3.5 INCH HDD 256MB 7200 ENTERPRISE

Seagate SkyHawk 6TB SATA3 HDD, Durable reliability and performance tuned to the high-write workloads of today 24 Hours & 7days video surveillance systems (3 years warranty)

Seagate SkyHawk 4TB SATA3 HDD , durable reliability and performance tuned to the high-write workloads of today 24Hours&7days video surveillance systems ( 3 years warranty )

Seagate SkyHawk 8TB SATA3 HDD , durable reliability and performance tuned to the high-write workloads of today 24Hours&7days video surveillance systems ( 3 years warranty )