Go to “Your notifications”, then you will see “control panel” at left top. Look down left you will see “miscellanius”, click on “attachments”, look down left you will see “show thumbnails” click, then check off the boxes at right side, at bottom right it says “delete selected”
It the quota, works on file size. The smaller the file, the more pictures you can post.
So if possible Guy's don't submit pictures in .png format as they are much larger in size than .jpg files.
The are plenty of free on line programs to convert them.