Never had it happen, But, all of those files are foreign?
As in you didnt put them in yourself?
Have you recently added a new rom on before this happened?
One thing it could be is a corrupt rom
Or its got a virus on it.
Formatting it should get rid of it
This happened longer before, i just remembered them, and asked here, if you have a clue why this happens.
QUOTE(kobykaan @ Nov 4 2009, 09:53 AM) Card is corrupted backup any saves you can grab off it (if any) then FORMAT and reload problem solved
This is usually caused by the following/ along with several other scenario's ....bad programmed homebrew.. (an old version of dsorganize did this)
or trying to fit TOO MANY games in the root folder can also cause this to happen ..
Removing the mem card during file copy process or not using safely remove hardware on some card readers can do this too!
solution mentioned is to format and start over ... yeah a PITA if you loose your saves but not much else you can do