Why can't I view photos in the gallery?

[AC Question]

Can't view photos in gallery

I have some photos on a SD card. I attempted to open one and was prompted which app I wanted to use to open it; there were 2 choices, either "gallery" or "photos", I accidently chose gallery and now all the just have a box, with a mountain in it, and an explanation mark.

How can I get the photos back to being viewable?

 

[Manisha Gupta]

Re: Can't view photos in gallery

No thumbnail

 

[Dave McClure1]

Re: Can't view photos in gallery

No that I can see.

After clearing the Gallery app's defaults; I'm being prompted again for which app to use to open a photo. Is "photos" actually the right app to choose?