Saving OneNote notebook outside of OneDrive

Hello!

I noticed my OneNote has been glitching more often so I tried to move (and eventually separate) a large notebook from my current notebooks. In the process I noticed my notebooks are only being saved as html links in my One Drive folder in my laptop folder (besides always being synced online as part of OneDrive). These html links directly send me to my synced notebooks on OneDrive online. 

I want to store a notebook elsewhere so I can always access it if I need to, but I don't want this being synced and stored as online data anymore. How can I do this without deleting the notebook? 

Thx!