A Microsoft file hosting and synchronization service.
Hello, are you seeing this message when syncing files or when saving a specific file?
Reset the OneDrive sync app to clear incorrect storage status. Press Windows + R, paste %localappdata%\Microsoft\OneDrive\onedrive.exe /reset, then press Enter. Wait a minute, then open OneDrive again from Start. If the icon does not return, run %localappdata%\Microsoft\OneDrive\onedrive.exe. This refreshes sync data and fixes incorrect space reporting without changing your files.