I have mostly good news but one remaining piece of bad news.
I have successfully gotten my entire iTunes library onto the non onedrive part of my file system. That is a huge relief. Thank you all for the help!!
Here is the one piece of bad news. When I first started iTunes, it wanted to use the itunes files on Onedrive. I changed what files to use by editing preferences to point to the itunes files in my regular file system. Everything was cool. I stopped iTunes and restarted it. Somehow it had decided to change the location of my iTunes files BACK to onedrive! For the life of me, I can not figure out why it did that and does it every single time I change the location of the iTunes files to my regular file system. When I next try iTunes it has relapsed to Onedrive. This really isn't anything to do with iTunes so I am probably now in the wrong forum but if anyone has an idea what might be going on here, I would greatly appreciate hearing what you have to say. I should say I have done everything humanly possible to stop Onedrive. I have even deleted onedrive from my file system but as soon as I restart my PC, it is back. Clearly I am missing some trick to finally get rid of onedrive forever.