My pics only upload if I reduce the size quite a bit. Otherwise they 'fail to upload'. I left click on my picture and select "open with", and then choose "paint". In paint I choose "home" at the top, and then "resize". Then I type 25 in the 'horizontal' box, changing the size from 100. (All the other boxes will automatically change to 25 too.) Then I close out and hit "save" when it asks me if I want to save it.
Then, and only then, are my photos ready to be uploaded on the QB. I take photos with my IPhone and they come out huge. They always have to be reduced to just 25% of their IPhone size.
Good luck!