My friend wanted to download all the demos from eshop,and he made his 3ds downloading data for 5 or more hours
And now he's quite worried if such large amount of data transferred from the internet pass the 3ds to the sd card will do harm to the system and the card.
He also see really small scraches[invisible if see from above,but visible if seen from side]on the metal parts of the sd card.will that have defect in the sd card reading process?He has some downloaded softwares in his card.