As part of my WordPress site, upholsteryblog.com, I have a page called “Ask an Upholsterer”. The purpose of the page is for people to ask questions about anything to do with upholstery. Some questions can be best answered if I had a photo of the project to get a visual idea of what the question may be about.
Dropbox may be the best answer. With a free Dropbox account, you would simply upload the photo(s) to your Dropbox folder and get a link to the photo. When you ask a question or add a comment to “Ask an Upholsterer”, you would simply add your link to the photo.