Micah: thank you for your thorough and helpful advice. Who at and how do I contact Apple so someone can help me?
I do not use Logic Pro X, but your suggestion led me to what I think might be the problem.
I accidentally left my desktop on for a while and a lot of File Provider junk was generated. Propagate had files and folders in it. The disk was so full I couldn't just move to the trash, so I went through things one by one for an hour or two until I could mass delete.
The files were gibberish to me, but the folders held 20+ GB and had 20,000 pdf files from a program that is used to store scanned documents. It may be the current file, but since there are 20,000 plus of them and I have to go one by one, I don't know for sure (open the document, see what dates were on the documents). Each folder had what appeared to be the same contents.
At the same time, I have back up files from the same program stored in the cloud (but for different time periods) created in the same program but they do not seem to be causing any problem.
I was going to unlink and re-link to iCloud, but on Sonoma it asks if you want to get rid of all the files on your desktop. The answer is no, I do not.
Interestingly, iCloud is syncing upwards (new documents and updated old documents created on my desktop appear on the iCloud website for my account), but I am not able to download through Finder when the file is indicated to be on the cloud. I have to go to iCloud and download them one by one.
Desktop and laptop doing the same thing, just different frequency and different numbering system.
Therefore, any suggestions appreciated. Thanks for your help so far.