Nope... Some company sd cards have this problem.. It gets easily affected by viruses... Try SanDisks class 10 memory card with some new antivirus technology.. It should work.. Or simply change to any other memory card.. And reset ur phone...
My m2 did that said unmounted unexpectedly couple times then out of no where SD card cant be found try using it in other phones and is like the memory card is a ghost cant work no where cant understand why the phone damaged my brand new memory card? Plus is the second one it damaged....
