If you have a physical copy, your SD card has pretty much nothing to do with it.. besides pictures and extra data. If it doesn't recognize your SD card, your town wouldn't be corrupted because it wasn't the cartridge.
If you have a physical copy, your SD card has pretty much nothing to do with it.. besides pictures and extra data. If it doesn't recognize your SD card, your town wouldn't be corrupted because it wasn't the cartridge.
Your save data is stored in the cartridge,so you should worry about that than the SD card So always make sure that no physical damage is done to the cartridge to prevent possible save corruption or loss of save data.