Seagate STBD4000400 4TB 3.5" Internal Hard Drive, SATA 6Gb/s Interface, 64MB Cache, Up to 6 Gbps Transfer Rate

The Seagate STBD4000400 4 TB 3.5" Internal Hard Drive is the industry standard hard drive for mainstream desktop computing, delivering both exceptional reliability and performance. A host of refined technologies helps boost performance further than ever before. The Desktop HDD is perfect for desktop performance towers or All-in-One computers, consumer-grade NAS devices and desktop RAID arrays. In fact, the Desktop HDD gives you one hard drive platform for every desktop storage application.

This incredible storage density drives new capacity possibilities and lowers your total storage costs. Perpendicular recording technology increases performance and reliability by aligning the data bits vertically on the disk. Additionally, Seagate OptiCache technology helps boost overall performance by as much as 45% over the previous generation and Seagate AcuTrac technology provides reliable performance, even in tough environments. The free Seagate DiscWizard software allows you to install 3 TB and 4 TB hard drives in Windows, including XP, without UEFI BIOS.