CD’s and DVD’s can get lost, scratched, or damaged so it’s best to backup copies of them in case you need them in the future. An even better Idea is to create a digital copy on your hard drive so you can burn a copy whenever you need it. Image backups are stored as ISO files.

Download and install IMG Burn (Freeware)
Insert the CD/DVD you wish to copy
Launch IMG Burn
Choose the option create image file from disc

Then choose the location to save the backup copy
If you want to burn a physical copy insert a blank CD/DVD
Then Choose the option write Image file to disc and select the image file/ISO from your computer.