I was able to solve this for my DS218+ just now - With the right sharing configuration on the Synology side, it all lines up and works very quickly.
To minimize (or maybe maximize) confusion, I’ll try to explain step by step and/or setting by setting. I did this all in one go, so I don’t know which of these are unnecessary, but it definitely works, so…
- I set up a Nucleus+
- I’m using DSM 7.0.1-42218 Update 3 (might be these notes are useful for anyone on this Synology DSM)
- I ported to the DS218+ web interface (by entering the IP into my laptop’s web browser, but I also have it linked/mapped in my PC network panel, which can be linked through via File Explorer)
- I opened the DS218+ Control Panel - In it I set parameters in three areas:
- File Services: Under SMB tab, enable SMB service. Under advanced settings, set Maximum SMB Protocol to SMB3, and the Minimum SMB Protocol to SMB2. SMB Range is SMB2, SMB2 and Large MTU, SMB3. Check the three: Enable Opportunistic Locking, Enable SMB2 lease, Enable SMB durable handles. Save settings.
- User&Group: I created a new user named, “Roon” I only set the following parameters for that user’s tabs:
- Info: I named the user (Roon), used an email different than the ones I use for admin roles and set the password to one that uses only letters and numbers (but made it very long)
- User Groups: Set it to users only
- Permissions: I gave read/write permissions to two folders in the NAS - The one with my lossless ALAC files and the one with my MP3s. Those are the only two folders this user can access.
- Applications: I set it to allow for all. Save settings
- Shared Folder: Select the folders with the music in them and click edit. Go to the Permissions tab and set the user named Roon to Read/Write. Save settings
Once this is all set, I exited out of the Synology Control Panel and dashboard and pulled up the Roon Labs app to add a new path and entered into the Roon Labs setup the following:
“\\[name of your DS218+]\[folder name]\[folder name]” Note: paste your details over everything between back slashes and only paste the characters between the quotes. As the dialog prompt indicates, two backslashes begin the string, and a single backslash separates the server name, directory and subdirectory.
Name of new roon dedicated DS218+ user profile I created above (in my case, Roon)
That password from above that uses only letters and numbers
Once you hit enter, it should be off to the races. It found my music, devices and outputs immediately. To prove it out, I then added the second folder, and it worked again. Hopefully this works for you too. The issue here is not the Roon, but the NAS with its tons of configuration options for many kinds of use cases, and only one very specific and fiddly path (so far) for this unique use case.