Western Digital Black 1TB WD1003FZEX 7200 RPM 64MB SATA 3.5'' Desktop Hard DriveThis drive tested at 100% HealthAll of our hard drives have been cleaned, wiped, and testedAll of our hard drives are pre-owned and not newWe use Hard Drive Sentinal for testingHard Drive Sentinal gives a health rating for the driveWe do not list drives with a poor health rating, 95% - 100% onlyWe do not do block or sector testing as they are used drivesWe do guarantee them wiped and functionalIf you have specific needs, please ask us before purchasing