What o/s on the computer, and what program does it try to open the images in?

 

Try and copy one Photo I had the same problem and it would not copy large Files
But ok if done in small packet works ok from my dell laptop

 

Check the file extension on the Sony pics. I have a sony camera and the default setting saves pics in an unusual sony format. However there is a setting in the camera to save as jpegs which you should then be able to view on the tablet