To download a property photo from the "Media" tab of a property record, simply click on the small thumbnail size of the photo to pull that photo up in a larger size. 

Right-click your mouse on the photo and choose "Save image as" (in Chrome, Safari or Firefox) or "Save picture as" (in Internet Explorer) and use the "browse" box that pops up to choose the destination folder. 

This will download your original photo, at the original size/resolution you uploaded, to your computer.