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This family of Addonics HDD duplicator is an economical one to one hard drive duplicator that makes coping any 3.5" SATA hard drive to another 3.5" SATA hard drive (HDD Duplicator) or 3.5" or 2.5" SATA hard drive to another 3.5" or 2.5" SATA hard drive (HDD Duplicator Deluxe) fast and easy. There is no computer needed or complex software to operate. Just open the doors on the two drive bays, load your master hard drive to the drive bay on top and another hard drive of capacity equal or larger than the master drive to the bottom drive bay, lock the drive door and push the start button to start the copying process.