Western Digital RE4-GP WD2003FYPS 2TB Intellipower 64MB Cache SATA 3.0Gb/s 3.5" (Enterprise Grade) Internal Hard Drive - [Certified Refurbished] w/ 1 Year Warranty This Certified Refurbished product is tested and inspected to look and work like-new, with limited to no signs of wear. The product comes with relevant accessories and a minimum one-year warranty. 2TB Capacity, Intellipower (5400RPM~7200RPM) Rotation Speed, 64MB Cache 3.5" Internal Hard Drive, SATA II 3.0Gb/s, Enterprise Grade, Heavy Duty Works for PC, NAS, NVR, CCTV DVR Passed Factory Diagnostic Software + RE-CERTIFIED by State-of-the-Art software - Full "Sector-by-Sector" test to ensure best HDD quality! ZERO Bad Sectors!