[Support UASP SATA 6 Gb/s] Uctech USB3.0 to SATA Hard Drive Docking Station for Dual 2.5 inch/3.5 inch Hard Disk Drive HDD and SSD with Standalone Offline Clone/Duplicator Function (Max. 2 x 4TB)

The product has worked very well for my needs. I specifically wanted a product that also supported e-sata rather than just USB2/3. I have used it twice as a hard drive duplicator. (First time I cloned my Laptop 500gb drive WD, to a 500GB Seagate). Worked perfectly. Simply removed my laptop drive and placed it in the "Source" location, added a second drive in the "Target" location. Hold down the power button to turn unit on and push the PC/COPY button for 3 seconds until it turns to red from blue. Hit the start button and in about 30 minutes the drive was cloned perfectly. Placed the clone drive back in PC and everything worked perfectly. (This first test was simply to see how well the unit worked.) My real test was to add a 2TB drive to my laptop using this unit.). I purchase the drive from Amazon and placed it in the target location. and repeated the steps. after completing the clone, this time we needed to extend the partition on completion. I placed the cloned 2TB drive back in my laptop and booted up. Downloaded a free partition program (In my case MiniTools Partition Wizard personal edition for windows). After extending the partition, my laptop now had a 2TB working drive with all my original programs. (This was a massive time saver compared to reloading all the programs and starting clean with a new Windows install). This also is a major time saver compared to using an image backup program like Acronis True Image. As cheap as may hard drives have become, it's actually a cost effective way to make a backup of your laptop by simply saving the extra hard drive in a drawer.All the hard drive cloning is done without any USB or e-SATA wires connected. The unit is used completely self contained for cloning. When not cloning drives simply using it as an archive storage when hooked up to USB2/3 or faster e-sata works great. For USB, 2 drives can be detected and accessed at the same time. Just like hooking up external flash drives or hard drives to USB ports or hubs. For e-sata only the first drive on the unit would show. I contacted tech support on this and they were very helpful. The limitation, at least on my case may be an e-sata one with my laptop. e-sata appears to be a dedicated connection, at least on how my laptops e-sata access works. Perhaps some users with the right cable and e-sata controlled can access 2 drives at a time, but that was not my situation, and in all honesty not much of a limitation for my needs. I was mostly interested in the much higher transfer speeds that e-sata offers.Bottom line - The unit meets all my needs, and has worked perfectly. Easy to justify the cost even if you do not need to clone drives and want to use it for external archive storage with USB or e-sata. I specifically chose this unit because of the e-sata support, which was worth a few dollars more that a unit that only has USB.

Read reviews, a few have better instructions on how to use this without a computer than the instructions that come with it. I use it hooked up to my iMac (Yosemite) to transfer files off older and loose drives, Insert drive(s) they show up on desktop, drag and drop files, eject remove from slots, done.The clone option worked well without the Mac involved. When I plugged it into my iMac, the drives appeared on the desktop pretty fast. I was able to drag and drop files with no issues.Drives, both 2.5" and 3.5" worked fine. fit nicely into slots.The info that follows are no reflection on the dock, rather info that a user should have before they use the device. A couple notes about cloning. once you start the process it takes a bit for any indication the process has begun, once it has it does it's thing, with blue lights advancing as it the cloning process progresses.Like others I did not hear any beeps or dings.Seems obvious but you have to format the drive for your Operating System if needed (for Macs as an example).The drive your are cloning to needs to be as big as or bigger than the original drive. I did not research before I did a clone and "lost" 680GB of space going from a 320GB to a 1TB drive. After I realized I should have partitioned the new drive.Being a novice at all this I felt comfortable using the dock for my needs. A more advanced user will probably get more from the dock. Good dock for the price. Lack of good, clear instructions are it's biggest con.

It took me a bit to figure out how to use the clone feature. The included manual said it would beep three times when the clone finishes, but I've yet to hear it beep. It can take several seconds after pressing the clone button before the lights change to indicate the clone has started. Then the status indicator lights chase each other (25%-50%-75%-100%-repeat). Once it's gotten to 25% the 25% LED stays lit and the remaining lights chase each other. It goes on like that until it finishes.Other then that bit of confusion I'm very pleased with it. It works as advertised and has a couple of nice features that previous SATA docks I've used don't. I like that it has a dedicated power button. Also I like the switch to put it into clone mode. I've used other docks that required the USB cable to be disconnected if you wanted to use it in clone mode.