With this 3.5" USB hard disk box it is very easy to connect a 3.5" SATA hard disk to an available USB port on your PC, notebook or netbook. Simply recycle the hard disk from your old desktop computer or just buy a new one. This 3.5" USB hard disk box is perfect for making back-ups of your music, videos, photos and files or just using it as external storage. Thanks to the screwless slider mechanism, assembly can be done under 5 seconds!