Hi @StevenP, to add to what @vincent has already told you, if you need to access those images, you can either publish site and right click on an image and save to your local PC or export your site. If you export your site, then all your images get exported to the local images folder upon export.
We are working on more robust file management/asset management, and it is on the roadmap, so watch for this in future updates ! Cheers, Dave