Funnily enough, you have posted an image of the filename so that really is a clever trick
when posting a link to the photo, it should have quite a bit before: 20180603_091103.jpg; it should start with https:// and then be followed by something like dropbox.com/2018/06/bluelabels_massive_carp/20180603_091103.jpg
I don't have a drop box account so don't know much more, sorry.