SATA Hard Drive Dock is a perfect solution to duplicate the exact content currently stored on your computers SATA Hard Drive. What's unique about this product vs any other external hard drive is that all of your OS (operating system) and program files are "duplicated" in addition to your data files making this a complete backup solution which is bootable. Means when your hard drive fails and you insert your duplicate copy hard drive you don't miss a beat. Your computer will start up and all of your program files including the OSF (operating system files) will be restored along with your outlook contacts and personal settings.