I bought a new R4 and at first it worked perfectly and games like my heart gold pokemon and mario party worked fine. But then suddenly it start to be unable to load and the message pls reset disk kept appearing. I have tried taking every game out of the r4 and puting it back in but it still does not work. Anyone know how to solve this problem. By the way I have no idea what reformatting your r4 means, so pls explain too... Thanks