Sandisk 32GB and 64GB class 10 card seems to have inherent fault that failed after a while, some lasted days, some abt 3 months, some no problem. Its been a known issues worldwide with lots of complains on smartphone usage beginning from S3 onwards.

I myself bought a 32GB class 10 sandisk BEFORE I found out abt the quick fail issue. If you know where is the service center for sandisk, you can try call and go exchange card for a newer one. A couple of months ago, sandisk mentioned they found and fixed the fault but don't know how true is that and whether the local center store the fixed version card. Most cards sold here might be old stock with the fault.

Have not use my 32GB yet.....should have bought other class 10 brand like transcend for peace of mind.