Open a OneNote Notebook
If you do not see your data when you launch OneNote you may need to Open the Notebook.
From the available options, do one of the following:
If the notebook you want is stored on OneDrive, you'll find it under Open from OneDrive. Simply click the notebook to open it.
If the notebook you want isn’t stored in the same location as the notebook you currently have open, click one of the available locations under Open from other locations
Open a notebook in OneNote for Windows - Microsoft Support