Just be aware that 800 series backup and restores are experimental at this time, and may not always work. You can follow this issue for resolution: 800 Series Z-Wave Controller Support Tracker · Issue #5257 · zwave-js/node-zwave-js · GitHub
I just did a backup of an 800 controller and restored to the same controller. There were no errors in the process, but I haven’t done any in depth verification.