what is an iso image file
How to Open ISO Files. An ISO image file (one with an .iso extension) is a type of disc image file used to replicate the contents of an optical disc, such as a CD. The ISO file for a given disc contains every piece of information written to the disc.ow to Open ISO Files. An ISO image file (one with an .iso extension) is a type of disc image file used to replicate the contents of an optical disc, such as a CD. The ISO file for a given disc contains every piece of information written to the disc.