Google Imgur and click on "upload images"
Click "choose photo/video" or "paste image or URL" and choose your photo that you want to upload
On the next page your pic will show and "copy link" will appear in the top right corner. You need to click on that "copy link" button to get options.
On the options that pop up, choose the "BBC Code Option" and copy the link. Paste it into MDS, with no link or additional HTML coding and your pic should show up.