This item is for one Western Digital WD10EURX-63FH1Y0 DCM: HGRNKVJAH (WMC1) Malaysia 1TB 3.5" Sata HDD DEC/2012. This drive and all of our drives are professionally tested and cleaned on a DOD certified machine at Oem level. We do not use software for this process! Once they have passed our Quality control they are 100% in perfect working condition!