I don't know when this all started.
Only thing done recently was buying Super Mario Bros. 3 from the eShop.
I can go in to >Saved Software and see everything there. Once I go to the home screen; it's all gone.
I've checked the memory card against my computer. It reads fine.
The memory card isn't locked.
I've repeatedly restarted it with and with out the card.
The 3DS is up to date.
I can't connect to the eShop to re download anything. It displays an error code saying the memory card can't be read.
Anyway, thanks for reading. Any new ideas would be helpful. 