Could you please share more details about the music files you mentioned? What is their source: a local library? Or maybe you are referring to music sourced from a streaming service?
These deleted files, are they simply not visible in Roon or are they deleted from your storage location?
We’ll require some additional information in order to take effective action on this thread as a support team.
Can you please elaborate on the specific issue you’re encountering with these local files? If you can provide answers to the specific questions shared by @alex_h above, we’ll be equipped to offer some suggestions.