HGST Travelstar 7K1000 2.5-Inch 1TB 7200 RPM SATA III 32MB Cache Internal Hard Drive 0J22423 1TB of Capacity Advanced Format, industry standard 4K sector size 512 byte emulation (512e) 7200 RPM high-performance HDD 6Gb/s SATA interface; Please refer the Application Guide before use.