I want to delete these MP3 files from my SD card and put some new ones on. I can't delete them because it says they are copyright protected or something like that. That's impossible because these are just MP3s I made myself from audio recordings of outside sounds. No music or anything like that whatsoever. How come these files are write-protected? I never made any modification to them. How do I get rid of the write protection so I can delete them? If it helps, I am stock rooted, but I did get rid of some of those annoying media files (i.e. DRM) that drained my battery.