1.The product have a hard disk storage box, appearance, which can store and protect your hard disk. 2.Hard disks are supported: Only protocols hard disks can be inserted into the left side of the hard disk copying machine, and only NVME protocols hard disks can be inserted into the right side of the copying machine. 3.After the protocols hard disk and NVME protocols hard disk are correctly inserted, after the hard disk test indicators is on (if the hard disk test indicators is not on, please check whether your hard disk protocols not meet the requirements), press and hold the offline cloning button, and you will see the cloning progress indicators flashing, and then press button briefly to starting automatic cloning. 4.Hard disk reading and writing function Support reading and writing of hard disk. Support reading and writing of NVME hard disk. Support simultaneous reading and writing of hard disk and NVME hard disk.