Hi Tanyatmf,
Dear member of SanDisk Community, welcome.
1- Â Please, clean the pins of the card and the phone slot, with isopropyl alcohol (or if not, medicinal).
2- Â Try another card, also, in the phone.
3-Â Test your card, microSDHC of 32 GB, in a laptop, directly to its port-card, with a good adapter (NOT a card-reader).
4- Â If still bad, in Start / My Computer , on the card icon, click the right mouse button, and then click in Properties / Tools / Error Checking and Repair.
Â
Luck, and then you tell us , what happened, please.
Regards, Alfred.                                                             (Google translated)