My OneNote cannot sync even if I have ample OneDrive storage

If clearing the cache was unsuccessful, maybe a single corrupted section within your notebook on the OneDrive server, which is causing the misleading out of storage error. To fix this, you must isolate the faulty section. create a new, blank notebook in OneNote, then systematically rightclick each section from your original notebook and use the copy function not move function to transfer them one by one into the new notebook. When the sync error appears on the new notebook, it will be the corrupted section. Fix the problem by manually creating a new, clean section in your original notebook, copying the content from the pages of the corrupted section over, and finally deleting the old, faulty section to permanently resolve the sync issue

Hello sir,

This is what happened when I tried making a new notebook:

I am very sorry to say that currently I am unable to answer questions on this platform due to some technical error so I will transfer you to another expert. Thanks for your patience.

It's fine - Thank you very much for your help! I hope MS takes cognizance of my ticket.