No, not exactly that I'm afraid. I'd rather see all the pictures together so I can compare though. Thumbs.db size depends only on how many pictures in a directory. Let's see...a directory with 172 pictures has thumbs.db that's about 1 meg. But it's easy periodically to turn caching off, search and delete 'em all, then turn caching back on. Explorer only makes the file if you view the directory. And if you can see the pictures it's easier to find duplicate files.