What would cause my zte phone to make 2 sd cards undetectable

[Android Central Question]

Iall of a sudden my zte phone didn't register my son card so I tried another one and same thing. Not registering either of them on other devices as well

 

[B. Diddy]

Welcome to Android Central! SD cards can become corrupt, or be defective or counterfeit. Did you get both cards from the same seller? Try a new card.