In the Sync your settings section, toggle off the settings you do not want to sync. You can choose to disable syncing for theme, passwords, language preferences, Ease ...
To backup your files with OneDrive, you'll need to turn on the feature in the "Backup" tab of your OneDrive settings.
Windows 10 computers will still run - but they will no longer receive crucial security, feature, or technical updates, leaving millions of users potentially exposed to cyber threats ...