I wanted to use my old HDD from my crashed addition. But for lacking the necessary power connections. While it was still a place, but this is too short. Here I can possibly On2. Install and connect the DVD drive. Ergo I ordered this Y-cable. It was delivered today. I shut down the PC, plug pulled, and the cable connected from the HDD 1 to the y-Tecker. Then I connected both HDDs. Booted PC and it all works well. Transmitting just the files from the old to the new HDD. Will this eventually reformat and use for backup (Backup). The product is recommended to fully.