Western Digital Gold 3.5 Inch 18TB Serial ATA HDD Conquer tough workloads with enterprise-class WD Gold HDDs. Available in 1TB to 20TB capacities, these highly reliable solutions for demanding storage environments provide up to 2.5M hours MTBF, vibration protection technology and a low power draw thanks to HelioSeal technology [for 12TB and above]. Specifically designed for use in enterprise-class data centres and storage systems, the WD Gold SATA HDDs deliver the world-class performance you expect from Western Digital hard drives.Please note this item is non-returnable, see our returns policy for more information.