MikroTik backup files are proprietary binary archives. They contain the RouterOS configuration database, including interface settings, firewall rules, IP addresses, and user credentials.
The best way to "open and repack" a configuration is by creating an .rsc script file: in Winbox or via SSH. open mikrotik backup file repack
These are readable text files containing the CLI commands needed to rebuild the configuration. This is the format you need if you intend to "open" or "repack" the settings. MikroTik community forum 2. How to "Open" and View a Backup MikroTik backup files are proprietary binary archives