Dkopp is a program used to copy or back-up disk files to DVD or BD (Blue-ray) media. Full or incremental backups can be done, with full or incremental media verification. A GUI is used to navigate through directories to select or de-select files or directories at any level. Backup jobs can be saved for later re-use. New, deleted, and updated disk files are handled automatically, without re-editing the backup job. An incremental backup updates the same DVD/BD media used for a prior full backup. Files can be restored to the same or another location on disk. Large backup jobs can be done using multiple DVD media.