A Microsoft file hosting and synchronization service.
Hi,
As AI answer suggested, please click the cloud icon on the Taskbar to find the sync/download status.
If you can't find it, click the gear icon in the same screenshot and select Settings. Then, go to Account and click Unlink this PC.
Press Windows+R keys on the keyboard, or Right-click Start on the Taskbar and choose Run.
Paste C:\Program Files\Microsoft OneDrive\Onedrive.exe /reset
Press Enter.
Sign in again and verify.
I look forward to hearing from you to get the results of the troubleshooting.