This usually occurs when your "Media Library" in your Mindahome control panel is full. It holds 25 files. Every time you attach photos from the device you are using to browse the internet, they are saved in your Media Library for quick access next time you need them. Once you have all the files you need stored in your Media Library you should always choose to attach files from there. Please go to your "Media Library" and delete any files you don't need. You may find many are duplicated.