Around 9 years ago my wife and I returned from vacation and she uploaded all her photos and videos from her little camera to Dropbox. She forgot all about this, and we had for years thought the photos were lost. Well, she recently logged into her Dropox and found all the photos and videos in there. Some of them are fine and open well for viewing, but most of them are showing as 'zero byte' and don't open at all. Can someone help us open those 'zero byte' files?