Samsung Galaxy 5S My photos turned to blank beige screens

A

AC Question

I took 300 photos on vacation in Costa Rica and 88 of them (a consecutive set) now show up as blank screens of various shades of beige. I know the photos were there when I originally took them because I posted several of them to Facebook at the time. I'd like to post a screenshot of the gallery to show what I mean--how do I post a photo?