Hello Blue,
I am Jaspreet Singh an independent advisor.
Click on the small onedrive cloud icon in your taskbar (You may need to click on the up arrow to see it)
Then click on help and settings and then again on settings.
Then in the pop up window click on backup tab in the same popup window.
click on manage backup and untick all three (desktop/documents and pictures)
Make sure all these three options have stopped backing up .once this is done close the backup window
You will need to visit the location where these folders were and then you will see a link with the title “where are my files” click on that and then it will take you to the files location. Copy and paste the data back to their respective folders.
That is all. OneDrive will not backup your data from these libraries any longer. please let me know if you face any issues.