Although disk cloning programs are not primarily backup programs, they are sometimes used as such. A key feature of a backup program is to allow the retrieval of individual files without needing to restore the entire backup. Disk cloning programs either provide a Window Explorer like program to browse image files and extract individual files from them, or allow an image files to be mounted as a read-only filesystem within Windows Explorer.
Ghost is marketed as a backup program. It come with an ISO file that needs to be written to a CD. This provides a recovery environment to perform a full system recovery. There is also provision to mount a drive and select backed-up files from that drive and recover them to the primary hard disk.