Hi All
There has been reported issues of some of the older 32GB MicroSD HC cards in Samsung devices.
I have the same fault on a 32GB Micro SD HC Class 4
Samsung advised me to call Sandisk and Sandisk advised their newer 32gb cards have a newer format and will cure the issue. Will be recieving a new one under RMA in the next 7 days.
Give them a call guys (its not about needing Class 10), its a known defect
All the Best
Chris