apologies if this is something you already know, but folder and file names are not really very relevant in Sonos (or similar player systems for that matter.
Sonos scans all your music files and builds indices based on the tags for album, (or album artist, selectable in prefs), artist, genre, title, and so on. when you search and select stuff for playback in Sonos, you use these indices.
Sonos keeps track internally which files and folders are pointed to by the indices, but the actual folders and file names can be anything, even gibberish, as normally using Sonos you won’t look at them.
If you want or need to, it is also possible in the Sonos controller to search by folder/filename instead of searching by tags, but the whole point of tags is to make more logical, powerful searching.
That said, having folders and filenames which follow a logical system will make it MUCH easier to manage your collection, using tools like Jaikoz.
There are several folder and filenaming conventions that people commonly use, and the Jaikoz defaults will be a good starting point. I think most people get their tags sorted first, then rebuild folder/filenames based on tags according to some scheme or other.
Again, using Sonos you should really care more about your tags, less about your file structure.