Multiple OneDrive Accounts

I have recently started to use three different OneDrive accounts. I am having a terrible time trying to open files. I create "Newsletter.7.21.2021." It is created in OD account newsletter4294. I go on and do other work, possibly in one of the other OD accounts I use. I can no longer open my newsletter file. I assumed it was because I was not logged into the newsletter4294 account, so I logged back in. I have this trouble multiple times across all three accounts. I can't figure out what I am doing wrong.