The Sabrent SATA Hard Drive Docking Station enables you to access desktop or laptop hard drives, without the frustration of assembling hard drive enclosures. By inserting a 2.5"/3.5" SATA hard drive directly into this docking station, you can quickly access drive contents and transfer files. Plus you can swap out hard drives effortlessly with plug and play mounting. Transfer data quickly and easily through USB 3.0 at speeds up to 5Gbps. To use Hard Drive Offline Clone Function: 1. Insert Source Disk into hard drive bay A, then insert Target Disk into hard drive bay B. 2. Make sure that the USB cable is disconnected from your computer. 3. Connect power supply and switch on power. 4. Hold down the CLONE button, release when you see a Blue LED. 5. Then quickly press the CLONE Button. 6. A Blue LED will flash on 25% indicating that the cloning process has begun. 7. The cloning process is complete when ALL the lights turn solid Blue (25%-100%). 8. Finally press the power switch to the OFF position and eject your drives. Sabrent 2.5-Inch SATA to USB 3.0 Tool-Free Clear External Hard Drive Enclosure Supports Standard Notebook 2.5″ SATA and SATA II Hard drives. Transfer Rates Up to 5 Gbps when connected to a USB 3.0 port. Transfer Rates Up to 480 Mbps when connected to a USB 2.0 port. Hot-swappable, plug and play, no drivers needed. Backwards-Compatible with USB 2.0 or 1.1.