I've already deleted them, but I tried close to 8 or 9 from the play store. None of them saw the files. I could only see them by using a file converter app. But, for unknown reasons, the app crashed whenever trying to convert the files.
Not yet. That would have to wait until I am home later today. Was looking for an app that would show the files in an explorer-like window in which I could select and delete the files. Hopefully laptop will see the files later...