Thumbnails not showing in file explorer

[sooz]

Are you using OneDrive?

EDIT:
If you are syncing your files to the cloud, here is one solution to retain the thumbnails.

Thumbnails Not Showing Pictures

OneDrive has a feature called ‘files on demand’. This will upload your file to Microsoft’s servers, then delete it locally. Because of this, Windows cannot generate the thumbnails. Right click OneDrive in the taskbar Click ‘more’ and then settings. At the bottom, if ‘save space and download files’ is checked, that is you problem. If you uncheck it, you will see thumbnails again but OneDrive will re-download all files in the folder. If it isn’t checked, try clearing thumbnail cache. Click t…