Windows 11 tries to trick you into thinking your files aren't backed up if you don't back them up into OneDrive via a flashing button right in Windows Explorer. You'll quickly run out of space and have to pay to increase it. And running out of space will shut down your Hotmail/Outlook email account connected to your install.

Windows 10 and 11 both try to trick you into switching from a local login to a cloud login. And in that process trick you into putting your Documents, Desktop, etc into the OneDrive cloud. As you run out of space, your connected Hotmail/Outlook account will shut down until you pay them to increase the space.

My Dad's 80+ year old neighbor had this happen to her. She couldn't figure out why she wasn't able to email pictures back and forth with her daughter. And she was already paying for Carbonite cloud backup. It took me an hour to get it all sorted out.