To backup your files with OneDrive, you'll need to turn on the feature in the "Backup" tab of your OneDrive settings.

You can sync specific files and folders to OneDrive on your computer under "Preferences" in OneDrive's "Help & Settings" menu ...

For those with multiple PCs wanting a clean install, this could lead to a cluttered desktop with shortcuts to apps that aren't installed, which isn't ideal. OneDrive cloud sync can be a powerful tool ...