It is also used as an easy way to upgrade your hard drive. This is also very handy to use if you have a physical hard drive failure and need to restore the image to a new drive. This media will allow you to boot from a CD or other bootable media to restore your computer from an image if it becomes so unstable that it will not boot.
True Image comes with a handy feature to create a bootable CD in case of a total hard drive or operating system crash.