I read the official article of how to import (https://docs.opnsense.org/manual/install.html#opnsense-importer) an existing configuration, and it seems quite straight forward.
I also came across with this post (https://forum.opnsense.org/index.php?topic=46152.0) where the OP stated the importer doesn't work as expected and he used a workaround - has anybody used the importer and in case can confirm whether or not it works as in the guide?
Tia.
If you use a dedicated USB stick and copy the config to the first FAT32 partition you should not run into trouble (for details see here (https://forum.opnsense.org/index.php?topic=9442.0)). If you like, you can test this by starting the live system in Virtualbox in your desktop environment. Be sure to always have a recovery strategy to turn back to the old installation in case of unforeseen issues
I used the importer a few months back (conversion from ufs to zfs). You can actually import the entire /conf folder if you want.
FWIW, I'm not sure the 2nd link in the OP is correct.
Okey dokey, thanks for the responses
Lastly, would it make any difference whether before I'd backup my current configuration, I'd enable back the root user?
I'm not really sure, but I recall a post where the OP, while trying to import the backup file, went into troubles because the root user was disable.