OneNote Gem Add-Ins

Question:

I want to create a OneNote notebook that can be saved on my local hard drive, and synced to OneDrive.com, and synced to my phone OneNote. Is it possible?
 

Answer:

OneNote's notebooks are divided into local notebooks and online notebooks.
 

OneNote’s Local Notebook

OneNote's local notebook refers to a notebook that is created on a local hard disk.
You can see the path to the notebook saved in the Files tab of OneNote –> Info page.
The path starts with a local drive letter, such as: C:\, D\: ....
 

OneNote’s Online Notebook

OneNote's online notebook refers to a notebook created in the cloud, such as OneDrive.com.
You can see the path to the notebook saved in the Files tab of OneNote –> Info page.
The path starts with https://.
 
Obviously, OneNote's notebook can't be saved in C:\, and saved under https:// at the same time.
So, your idea is not achievable.
 

Available Scenarios

Now, the available scenarios are. Create a notebook as an online notebook (for example, on OneDrive.com).
Then, use Windows Office OneNote 2013, 2016, 2021 for automated backups.
In this way, through backup, a notebook is stored on the local hard disk.