Sabrent USB 3.0 to SATA Dual Bay External Hard Drive Docking Station for 2.5 or 3.5in HDD, SSD with Hard Drive Offline Duplicator/Cloner Function [4TB Support] (EC-HDD2) Supports Standard Desktop 2.5"/3.5" SATA Hard Drives. Offline Cloning Function. Hot-swappable, plug and play, no drivers needed. Supports hard drives up to 4TB with USB 3.0. Reverse compatible with USB 1.1 & USB 2.0. Plug in Both hard drives and identify Source Disk and Target Disk<br> <span class="a-text-italic">HDD1=Source Disk; HDD2=Target Disk</span> Connect the Power Supply to the wall and switch on power. Press and hold the<span class="a-text-bold">COPY</span>for about 5-10 seconds until the LED starts flashing. The cloning process will start. On/Off power switch. LED light indicates Power and Activity status. Hot-swappable, plug and play, no drivers needed. Transfer Rates Up to 5 Gbps w/USB 3.0 Transfer Rates Up to 480 Mbps w/USB 2.0 Available USB 3.0 for high speed data transfer Reverse compatible with USB 1.1 &amp; USB 2.0. Windows: 2000/XP/Vista/7/8/8.1/10 (Both 32-bit &amp; 64-bit versions) MAC: OS X Sabrent EC-HDD2 Hard Drive Dock Power Supply USB 3.0 cable User Manual