It can be alarming to see an error warning overlaid on your file icons, but you don't need to start worrying just yet.

Why are there red X's on my folders, files, icons or the local Hard Drive in Windows 11/10. This post answers this & tells you how to fix the issue.

OneDrive Exclamation Mark Icon in File Explorer. 1. ... A red X on an icon indicates that OneDrive files, folders, or drives are not properly synced with your Microsoft account.