With massive capacity and innovative technology advancements, this Exos X18 enterprise hard drive is engineered to address the needs of the hyperscale storage market. The helium sealed drive design replaces air with helium inside the drive, to reduce air turbulence and allow more platters to fit in the same 3.5" form factor. Boasting SATA 6 Gbps host interface, 7200 RPM spinning speed, and 256 MB Cache, this 18 TB drive delivers Max. sustained transfer rate of 270 MB/s. And capable of 24x7 operation, the Seagate Exos X18 is a perfect high-reliability solution for servers, storage systems, and business-centric NAS systems.