20TB Capacity External Dual Bay hard drive docking station support up to 2x 10TB hard drives, Support 2.5 inch / 3.5inch SATA I II III HDD SSD hard drives simultaneously with Dual bay docking station 5 Gbps Transfer Speed USB 3.0 External Hard Drive Enclosure With the USB3.0 superspeed interface, the transfer speed reaches a maximum of 5Gbps and backwards, it is compatible with USB2.0 and USB1.1 Standalone duplicating / Offline Clone operation Support hard disk cloner and duplicator with LED indicator, from A drive high speed to B drive clone copies, source HDD to target HDD without connect to computer Better Heat Diipation Design & Tool-free Hard Drive Stock With the movable design, the hard drive is more stable and has better heat diipation.Tool-free SSD HDD Docking Station, Plug and Play, No Driver Needed Compatible Operating System The Dual Bay Hard Drive Dock compatible with Windows XP/ VISTA/ Windows 7/ 8 /8.1/ 10/ Linux/ Mac 9.1/10.2 or higher Support Auto-sleep Function The 10-minutes auto sleep mode effectively extends the hard drives lifespan and avoids data lo and corruption One-touch offline clone 1. Insert Source Disk into hard drive bay, then insert Target Disk into another. 2. Push the PC / CLONE switch on the back of the hard drive to the CLONE side. 3. Connect power supply and pre the POWER switch. 4. Then pre the START Button on the back. 5. A Blue LED will flash on 20% indicating that the cloning proce has begun. 6. The cloning proce is complete when ALL the lights turn solid Blue (20%-100%). 7. Finally pre the POWER switch and eject your drives. Note - Target Disk must contain more space than Source Disk. - Please backup files in the target hard drive before cloning. Any files in target hard drive will be overwritten when offline cloning occurs. - To avoid data lo, do not remove or insert drives when one drive is working in the docking station. Please power off the docking station before removing.