Each downloaded notebook is saved to your hard drive in Zip file format. If you want to later import a downloaded notebook, you’ll need to first unzip its notebook folder from the Zip file, and then import the folder to OneNote Online.

To import a notebook to OneNote that you’ve previously downloaded, do the following:

  1. Unzip the folder found in the file you previously downloaded. This unzipped folder is your notebook folder.
  2. In any modern Web browser, go to the OneNote Notebook Importer.

    Tip: Importing notebooks is not currently supported in Windows Internet Explorer. We recommend using Microsoft Edge on Windows 10, or any other modern browser in older versions of Windows.

  3. On the screen that opens, click Import.
  4. On your computer, navigate to the location of your notebook folder (see Step 1), click to select it, and then click Open to import it.

Tip: If the import process begins but then appears not to finish, your OneDrive account might be low on available space. Manually delete any unnecessary files from your OneDrive storage (including any failed notebook uploads) and then try importing the notebook folder again.

For more information visit: Microsoft Support