Dkopp is a program for copying or backing up disk files to DVD or BD (Blu-ray). Full or incremental backups can be made, with full or incremental media verification. Dkopp uses a GUI to navigate through directories to select or de-select files or directories at any level. Backup jobs can be saved for recurring use. New, deleted, and updated files are handled automatically, without re-editing the backup job. An incremental backup updates the same media used for a prior full backup. A GUI restore function is also provided. Differences between disk and DVD/BD can be reported in total, by directory and by file.