The red X icon that shows up next to your files on Windows is actually a OneDrive warning sign. It indicates a syncing error, ...
Then, on the other device, sign into the Google account and turn on sync. To back up your Chrome data, click the profile picture icon in the top-right corner and click "Sign in to Chrome" or "Turn ...
If any of these options are successful, you can access OneDrive and view the Sync and backup status of your data in Settings.