When Windows users suddenly discover that their files have vanished from their desktops after interacting with OneDrive, the issue often stems from how Microsoft’s cloud service integrates with the operating system. The automatic, near-invisible shift to cloud-based storage has triggered strong reactions from users who find the feature unintuitive and, in some cases, destructive to their local files.
It’s possible that this isn’t enabled by default in Europe. I know that Microsoft has some things disabled in Europe in order to comply with local law and moving stuff to OneDrive without asking sounds like it might conflict with the GDPR.