I always safe remove, and take good care of my r4 and my 2gb sd card. furthermore, they are both about a month old. While i was in a game, i pressed all 4 buttons plus L and R to soft reset. It took me to the main screen, but it was frozen. I restarted the system, and it said SD error. I put my sd card in my comp and it says I need to reformat. Two lessons learned: 1) back up your stuff 2) do not use soft reset in game. just power it off manually. sorry I meant to write "SD" not "SC"