OneNote automatically saves your notes while you work, but you should always back up your notebooks, just like the rest of your computer's files and data. Hard drive crashes can happen to anyone, and if it happens to you, your notes will be gone forever. If you back up your notebooks, you can restore notes from a backup if you ever need to. Notes: Automatic backup is only available in the Windows desktop version of OneNote. If you are currently using OneNote for the web or OneNote on another platform, visit www.onenote.com to download OneNote 2016 for Windows version of OneNote for free. Set automatic backups by choosing a location where you can store your files. Make sure you choose a location that's not on your computer's hard drive. Choose File > Options . ...