Turns off the caching of thumbnails in hidden thumbs. db files. This policy setting allows you to configure File Explorer to cache thumbnails of items residing in network folders in hidden thumbs. db files. If you enable this policy setting File Explorer does not create read from or write to thumbs. db files. If you disable or do not configure this policy setting File Explorer creates reads from and writes to thumbs. db files.
HKEY_CURRENT_USER -> Software -> Policies -> Microsoft -> Windows -> Explorer # DisableThumbsDBOnNetworkFolders
Windows Components -> File Explorer