Re: "Move Windows 11 increasingly to the cloud"
“could it possibily be that folders supposedly on my own hardware are actually stored/maintained on OneDrive ?”
It depends on how you have configured onedrive - accept it’s default setup and you’ll find your Documents folder (and many others) are being synced to onedrive - and will appear on any new machine you configure with the same account. Still held locally, but also available in the cloud.