games get deleted atleast once every 4 monts o.O

i dont know why, but when i play games on m3ds real, games wrok perfectly. what's strange is that my games and saves get completey wiped out after a few months(not exactly 4 months). its weird, because my brother also gets his r4 wiped out completely EXACTLY wen mine does. its strange only because we both lose our games and saves at the same time. im starting backup my saves and games once a week now, why does this happen?

Because the magnetic poles of the earth switch every few months and it is powerful enough in some areas to wipe out electronic data.Not really. It's probably just the flashcart corrupting your micro sd card.