OK so I bought an aftermarket SD card 4gb a few days after I got my Sprint Hero. I have been using it just fine till the other day when I really needed my camcorder / camera. I open up the stock apps and each says please insert sd card before using. No problems with the SD before this. I still can load things onto the SD card. Music still plays. Even added new music. Camera Magic app works fine too. Stock apps not so much. I have reformatted the card, power off and on the phone. removed the battery with the phone on and left it out for a few minutes. Any ideas as to what might be the problem?