Default How do I delete hidden files and folders on unrooted 4.3

So I did an OTA update to 4.3 about a month ago and it moved all of my pictures, music, etc. to location I can't find. That space is still being taken up on my phone. I've given up looking for it but now I would like to delete that data, Is there anyway to do this on an unrooted phone without doing a factory reset?

Thanks in advance.