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I usually use this way of exporting Notebooks for personal accounts.

https://support.office.com/en-us/article/export-and-import-o...

Dropbox. Basically, you can create a new notebook and all pages under that notebook are organized in a directory hierarchy. I've done this for just under a decade without issue.

Sorry about the bum link (it's fixed now).

The simple answer is you can download zips of the entire OneNote notebook from the OneDrive web interface.

You are able to print entire notebooks as a pdf. Its not the best, as text can be cut across pages if you don't originally fit into nice-paper sized areas, but it does export everything quit easily.