Welcome to Android Central! Do you mean 100 GB? That would still be an unusual size -- it usually goes up by multiples of 32 GB. Is it Class 4, rather than "4k"?
Can you give more details about how it's acting up? Can you test the card on another phone, or try a different card on your phone?
What do you mean that you put your husband on phone with a link? Do you mean that you created a Contact or Direct Dial widget for your husband on the homescreen, and want to remove it?