Seagate Barracuda XT 3 TB 7200RPM SATA 6 Gb/s 64MB Cache 3.5 Inch Internal Bare Drive ST33000651AS Massive 3TB capacity provides plenty of room for downloading PC games or storing many hours of high - definition video content The first comprehensive non - hardware solution to accessing 3TB capacity by using Seagate DiskWizard software The 7200 - RPM performance platform complements powerful combination of extreme storage and top - end desktop perfomance A 64 MB cache optimizes burst performance and reduces data throughput bottlenecks