Problem in folder and pics

hi all I’m good again for this forum
and I have only one problem with my WD 1TB live hub
in which I have folders within this video and I have the video and the image that corresponds
but some of these folders are not shown in the picture


folder (my movies) - Folder “Batman” - Batman. vob and Batman.jpg

If you’re expecting to see the picture when you’re browsing the FOLDERS, then you need to name the picture “folder.jpg”