Hardware
So this just happened. I had ordered an micro SD card USB stick to plug it into my computer and move cia files into it. As soon as I plugged my SD card into my computer, I wasn't able to open it. The same popup error came up telling me that I need to format the SD card. All I know is that formatting an SD card will delete everything. Is there a way I can recover or move my 3DS files somewhere so I can copy it to my computer\ another micro SD card??