As the title says, my 3DS will throw the "SD card not detected" error whenever the system is moved too much, though sometimes just pressing the buttons too forcefully will do it. This happens most often while on the main menu, and very rarely during gameplay. I have noticed the SD card budges a bit while connected, but I don't remember if it's supposed to not move at all when the system is new. So my question is if anyone's had this problem before, can it be fixed? Or should I just look for a replacement slot? I should mention that this also happens on 3 other cards, including the original that came with the system, so it's unlikely the cards are the problem. If changing the slot is the only solution, can anyone recommend a reliable seller?