Thanks for reaching out, @armeno_antonini!
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Just to confirm, you want to use your NAS as a watched folder in Roon, but haven’t been able to?
Do you get any errors when trying to add it as a watched folder?
Thanks!
Dylan