Pargin is right - this should be illegal. In fact it ABSOLUTELY would be, except for the @pluralistic rule: "It's not a crime if we're using an app".
They're literally breaking & into your house & destroying your stuff. No amount of obfuscating legalese would let you or me get away with doing that.
It's fucking insane.
https://www.techspot.com/news/110848-onedrive-backup-feature-making-users-local-files-seemingly.html