Preview Not Showing for photos dragged and dropped

[DavidMaerzke]

I dragged some photos from my phone's camera directory to our Sharepoint Site.  I had done this previously with "Upload".  The new files I just placed will not show a Preview.  It's difficult as it won't let you upload more than one photo 

[#2]

Hello, what is the current view of the Document Library? is it Tiles?