Running 4.1.2, many pictures in a folder in Gallery are simply gone. No unusual occurrences. I took a picture, and when I went to look at it, it was the only one there. There are other folders in gallery, that must have been created by the phone (download, Bluetooth, camera) and I am assuming there may have been one called 'pictures', as that shows up as an empty folder when I connect my phone to a computer. I have run different recovery software's that were recommended, but nothing is 'found'. Can pictures just 'disappear' and others remain?