SEAGATE SKYHAWK 4TB 3.5 INCH HDD 256MB 7200

The Performance You Need, the Versatility You Want?the Affordability You Demand
Seagate Enterprise Performance 15K HDDs improve your TCO for faster time-to-data for transaction-based applications.
With capacity options of 900GB, 600GB and 300GB, you never have to trade performance for affordable capacity

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 )