Originally Posted by Max_Pain
Source? I've had a 64GB SanDisk micro since they cost $100, across two Note IIs and now two Note IIIs and never had a problem with the sd card.
You're on the source. It's XDA and the many, many experiences from users. Plus of course general advice from Samsung itself.
To my knowledge SanDisk never made the 64GB MicroSD's below class 10...
It was announced second (After Kingmax, iirc) and first to market the 64GB MicroSDXC in September 2011, and that was a class 10....
The "basic" range doesn't go above 32GB.