unsupported picture file

First let me say this is my first smartphone so i have no idea about any of this stuff. I uploaded some pictures to my sd card some work and some do not. When i go to my pictures it shows the pics that work but the one that dont come up as a box with what looks like 2 mountains and a sun  and in the right corner a circle with a line through it. If I click on it it shows me the picture after a few seconds but will not let me add as a contact id. It says unsupported file.. The only thing I notice about the ones that work and the ones that dont are.. The one's that work are 1536x2048 resolution the ones that dont are 3264x2448 all are .jpg files.   Any ideas on what im doing wrong or how to resize them if thats what I have to do. Thanks
AJ

Did that still didnt work??