Notebooks can proliferate. So how do you get rid of them? It’s not always clear where they’re located.
In OneNote 2010/2013, click the File tab, and then click inside the link of the notebook you want to delete. Copy it. If it begins with https://, it’s likely stored in the cloud. Paste the link into a browser (e.g., Chrome, Edge) address field. Backspace to the last /, and press Enter. If it begins with a letter and :\, paste that link into the File Explorer address field. Now you’re in the right place for you to delete your notebook.