Summary: fixed my brother's and neighbor's laptops with it - I used same size Hard Drives to copy onto. Solved the problems of both computers. the more info on Hard Drive the longer it takes to copy - I set it and forget it before sleeping, all done when I wake. By the way - when they say external hard drive duplicator - they mean the Duplicator is external which is obvious - you can remove and copy internal hard drives.
Summary: This gizmo saved my rear end when my hard drive started to fail . I was able to make a bit by bit close of my failing drive and not miss a beat. Works independently of the computer so no OS is needed. Also is switchable to use as a regular usb drive .
Summary: I had a hard drive failing on my laptop, so I ordered a replacement drive. Even with numerous failed sectors on my original drive, this system was able to 100% bit copy the contents of my old drive to my new drive. I learned to be patient, because if you have many failed sectors, it might take many hours to copy over a 500GB drive.
Summary: My laptop was throwing ATA errors in the event viewer. I ordered a new drive (same size as the old one) and the Aluratek AHDDUB100. Removed the existing drive from the laptop and placed it in the duplicator. I checked, re-checked and checked again to make sure I had it in the correct slot. Place the blank drive in the other slot and pressed copy. Left it running for a couple of hours. Came back to a solid blue bar. Turned the duplicator off and pulled the new drive.
Summary: Dual SATA dock which also has a very useful duplicator function that allows you to create an identical duplicate of one drive onto another. The duplication function is much faster than syncing a drive to a 2nd drive via USB 2.0.
Summary: Great product. Copied a variety of hard drives when I upgraded my boot drives. Bit for bit, no issues. All drives booted and stayed windows activated afterwards. I used a free partition manager to match the partition sizes (expand to max drive size) after the upgrade. Haven't used it as USB storage but have used it to plug in drives to test if they would post.