I have an android tablet that I use for posting. Take picture (a little bigger than needed), crop to reduce size down to only what is necessary & save. It attaches fine after that. If not, you didn't crop it down enough. No need for sending to another computer. This method does not work on my android phone. Might not work for Apple but posted for people who may use an android tablet. Mine is a Samsung 10" about 3 years old.