Multiple Accounts and One Drive, I think

Our household has two computers, both of which are under my husband's account because I couldn't figure out how to change the one I use to my account. A couple weeks ago I clicked some OneDrive button and my computer began synching all our files, my husband's and mine, to both computers. I have his files on my computer in random places and he has mine. I suspect this is because both computers are under his account. It's like we functionally only have one OneDrive account and we've gone over storage. I've tried to fix it by moving all my OneDrive files to my C:\ drive so I could uninstall OneDrive, but it's only partially successful. Some folders just won't move, and others will. There are options for removing his account from my computer but I am afraid that will remove all my files too. At this point we can still access files on the cloud. Both of us just want to save all our files on our hard drives, save a backup on external hard drives, and stab OneDrive in the heart and uninstall it forever. Then I need to figure out how to change my husband's account to mine on this computer. 

Is this possible?

Signed,

Ready to give up and go live in the woods.