Yesterday I was playing a game that I haven't played in a while. Lock's Quest. When i was at the second level, I made a mistake. So i quit and I wanted to play where I last saved. But the sava data was correpted and was deleted. So I restarted my ds. I wanted to play an other game. But at every game it said: Couldn't find NDS/DS. Something like that. I restarted my ds, but then with big white letters it said. Couldn't find ds_menu.dat. I put the flashcard in my computer so that i can place a new ds_menu.dat in my flashcart. But everything in my flashcard is gone. There is one txt file in it named BOOTEX. But there is nothing in it. At properties it says my Flashcart is 100% Full. So what now? :'(
the card filesystem got corrupted, try reformatting. If that doesn't work then the microsd card has failed and you need a new one