Grappling hook peg

I accidentally renamed photos on my SD card and now i can't view them on my camera!!!? - rename sd

I rename some files on my memory card if I wanted to rename, but saved the pictures on my computer. Now I can my camera! I do not know what to do, but I want to see them wrong in my camera. Please, if u hav idea wat I do, my plee im soooo desperate to solve this problem!

I have tried to press the right mouse button and change the name, then click the back button and click on, but goes back to how it was!