So, I formatted my sup m3's micro sd card to fat32 so I could put it in my previous dsi's sd card adapter and put it into my current dsi, i wanted to test it by putting a m4a song file into it and opening the nintendo dsi sound app to see if it detects it, but when i open it, it shows an error that says something among the lines of "the object inserted in the sd card slot" isnt valid. (and yes i followed the sd card setup steps on the dsi cfw guide). I also tried with my 3ds' sd card but it showed the same error (and i'm sure that one met the requirements too). How do I solve this?