Seagate brings over 30 years of trusted performance and reliability to the new Seagate Desktop HDDs with an impressive 4TB storage capacity. Double your capacity and drive down costs with up to 1TB-per-disk hard drive technology plus SATA 6Gb/s interface optimizes burst performance. Seagate AcuTrac servo technology delivers dependable performance, even with hard drive track widths of only 75 nanometers and with Seagate OptiCache technology you'll notice an overall performance boost by as much as 45%. The included Seagate DiskWizard software allows you to install 3TB and 4TB hard drives in Windows, including XP, without UEFI BIOS. The best-fit applications for the Desktop HDD are: Desktop or all-in-one PCs, Home servers, PC based gaming systems, Desktop RAID, Direct-attached external storage devices (DAS), Network-attached storage devices (NAS).