@Calibre69 - please stop posting essentially the same thing in multiple threads.
You may not use Onedrive directly, but Windows will use it BTS if you don't take steps to stop it. As to why your ASUS and HP systems don't behave the same - this is a calibre support site, not an HP, ASUS or Microsoft support site.
My recommendation is simple - don't put your calibre libraries in the Documents folder.
BR
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