Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Check first, the File Type of the photo files that won't be read by the camera.
- Are they the same File Type as the photo files that CAN be read by the camera?
- And, are their file names any way different in some overt aspect, e.g. the insertion of a - character, or some other alteration from the usual file name ?
Let me know what you find out... I may have further advice.