When searching my Gallery for photos (which were not there because I had turned off sync, which I fixed), I discovered 2 new folders that were not there before. One is named "Person" and contains 5 items, and the other is named "Shirt" and contains 23 items, although all of the items in both folders only show a little person with a lightning bolt (which I assume indicates a bad, missing, or inaccessible file).

I did not create/name any such folders, so I'm a bit stumped. Any ideas what these are, and what they actually contain?