Ben with the support team here, thanks for taking the time to write in! Sorry about the delay in getting to your question, you shouldn’t have to wait so long for help - you have my apologies there.
I wanted to check in on your status, and if you were able to get your local files sorted out? This help article may provide additional help with getting your local library added to your Roon account:
Let me know how things are going - I’ll be monitoring this thread for your reply.