The folders you've mentioned are OS protected files. You shouldn't be seeing them and they are part of Windows. For instance if i use a mac and you use my thumb drive , you'll see a hidden . folders (i.e .DS_STORE). These are unique to MacOS X and in other OSes which does not obey the . Folder rules , it gets shown (for instance in windows , in linux it still hides the folder)

Anyhow this is why i do recommend people to get a sandbox as well to go together with the whole thing