clearing out "memory"

[csonni]

I've deleted all the files from my iRiver H10 on the computer, but when turning on the H10, all the "songs" are still there except they don't play. I don't see any when I mount it on the computer, but there is something still there in the H10 memory. Any idea what files to delete without bricking the unit? I can't find any way of resetting it that gets rid of those music "memories."