Corrupted Data Card

hey guys,

any1 experience a corruption on their card? as it becomes totally unusable and advices you to buy a new one? anyone know of a trick to make it work again?

I actually have a yoshi card and today was going well for me got promoted to 2nd dan( i know its not much to brag) then some cash to buy new customes. So happen that when i put my card on reader it says the its corrupted and cannot be used anymore.

Anyone has similar experience to mine?