OneNote Gem Add-Ins

Mac: Where are OneNote's Notebook Files Stored?

Question:
Where is Mac OneNote's notebooks saved?
 
 
Answer:
Mac OneNote's notebook real files are not saved on your local hard disk.
The notebook for Mac OneNote is saved on onedrive.com.
 
The caching mechanism is used locally. New, modified notes are saved in the cache file before being synchronized to onedrive.com to store.