The 1TB Seagate IronWolf is a high-quality HDD built for NAS storage that delivers incredible performance thanks to its easy to use 3.5 inch form factor that is just 26.1mm in height, the drive runs at 5900 rpm, the IronWolf's technical highlight is it’s 6Gb/s interface, which is the latest SATA III standard. This drive in particular has a storage capacity of 1000GB with a 64MB Cache.