Ok, the quick take of doing this: Long ago, on Contractor Talk and other forums, photos taken by my camera were always too large, and I was told to use an editing program. I found that using Xat image optimizer, the free version, worked great for those of us who are not computer savvy or literate. I posted the link.
Using this will enable anyone to edit the size of the file by using "compression", the fist in the tool bar, and cropping, to get to a file size of 40kb. No need to use drop box or the gallery if you want the fastest shortcut. Just down load the xat software, it is safe, and I posted the link, and use the free version, and get busy!