Is your Core running on the MacBook? If so, can you connect to the NAS in Finder, and share the path that works. Also, you may want to change hostname to IP address in Roon.
Yes. If you omit the share name, you should see the share list and be able to browse to the folder. If not, try escaping the space as shown, or change the share name, so it does not include a space. You could also try using quotes around “Muziekbibliotheek Theo”, but that may not work.
As mentioned earlier, use the IP address, and remove the space character. As @Torben_Rick says, the workgroup isn’t necessary.
Thanks Torben and Martin for your help.
It works!!
I’ve changed “Muziekbibliotheek Theo” in “Muziekbibliotheek” and I’ve used the IP address.
Thanks again!
Theo