We had a 7 year old computer that was having power issues (would no longer power up - sounded like it was shorting out). It was old, so we decided to replace it instead of trying to get it repaired. We needed a way to get the files off the old hard drive and transfer them to our new computer. This hard drive enclosure worked great. I opened the old computer, unplugged the hard drive, then took out the screws that held it in place. Next, I put the hard drive into the drive enclosure and removed the plastic covers from the sides and screwed in the screws to hold the hard drive in place. Finally, I plugged in the control unit (plugged right into the SATA drive) and screwed it into place. Done in less than 5 minutes. The enclosure comes with a power chord, USB cable, 6 screws, and a mini screw driver. All I had to do was plug it in to the USB port and turn it on. The drivers were installed and I could copy all of the files I needed. For $25, this was a great solution for recovering our old files. Now I can use it as a back up drive.