Hi there!
I assume that the Notebook is an app available in the Play Store, or a stock app on the phone. There should be an option to export data - if not, you should be able to connect your phone to the PC, open an Explorer window and go to your phone and the app's folder. It will probably be in internal storage, but I don't know how you have it set up. Then open a second window, go to the location on the PC you want to save it, and then drag & drop.