My friend and i got the new samsung glasaxy s4 mini about a month ago, my sd card has been working fine up until now. I can play everything thats on it but i can?t move or delete anything ? not even back to the phone memory itself. I tried my friends SD card in my phone and that worked fine but now she has put her own SD card back in her phone hers doesn?t work either now?? any ideas what went wrong? Does it sound like my phone is corrupting the cards?