Seagate 1TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive Retail Kit (ST310005N1A1AS) 1TB storage capacity with SATA III, 6Gb/s NCQ Interface Seagate AcuTrac servo technology delivers dependable performance Seagate OptiCache technology boosts overall performance by as much as 45% over the previous generation. Seagate Smart Align technology provides a simple, transparent migration to Advanced Format 4K sectors. Best Fit Applications include: Desktop or all-in-one PCs, Home servers , PC-based game systems, Desktop RAID, Direct attached external storage devices (DAS), Network attached storage devices (NAS)