An ISO image is an archive file, also known as a disc image of an optical disc, composed of the data contents of every written sector of an optical disc, including the optical disc file system.
An ISO image is an archive file, also known as a disc image of an optical disc, composed of the data contents of every written sector of an optical disc, including the optical disc file system. ISO images can be created from optical discs, or can be used to recreate optical discs using software from many software vendors.