Why not just export the secret key to the NAS and then import it on whatever device needs it? No reason to copy and paste the whole directory to each machine.
Remove every "AdBlocker" and install a real one, aka uBlock Origin. AdGuard is definitely a good extension but imo uBlock Origin is the way to go and using multiple have been proven to harm blocking capabilities.
OpenBoard seems dead. No word from the devs and no commit in almost a year. There is one fork that is trying to implement some new features here: https://github.com/Helium314/openboard/
Yes we know of it. That's why we actively avoid it. It doesn't take many searches to figure out its downfalls. AdBlock, AdBlock Plus, and the non Origin uBlock are all owned by the same company and they allow corporations to pay to let ads through.
Why not just export the secret key to the NAS and then import it on whatever device needs it? No reason to copy and paste the whole directory to each machine.