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Select the File menu and choose Options.
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On the Save & Backup tab, select Backup Folder.
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To change where a backup is stored, select Modify.
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To choose a time interval, select or clear Automatically back up my notebook...
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To manually back up, select Back Up Changed Files Now, or Back Up All Notebooks Now.
Tip: Optionally, under Optimizing files, set the amount of space files use and how often they're optimized.Â
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Backups of sections with sensitivity labels are saved as .onex files.
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.onex files are read-only when opened as a standalone
OneNote automatically saves everything you do. You don't need to save or back up your files.
You can modify backup settings in the OneNote desktop app.
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To open the desktop app, at the top of the ribbon, select Editing > Open in Desktop App.
Don't have the app? Get it for free in the Microsoft Store.
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From the OneNote menu, select Preferences and choose Backups.
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In the Backups dialog box, choose Back Up Changed Notes Now or Back Up All Notebooks Now.Â
To turn automatic backup on or off, or set how often it runs, select or clear Automatically back up my notebooks and choose an interval from the drop-down.Â
