If it were truly 64GB, it should be SDXC instead SDHC.
If you look on Amazon at the reviews for the exact same MicroSD as pictured here on this auction (http://www.amazon.com/gp/product/B00C592BR4) , you will see that most the reviews say it is a fake that is actually 2GB to 8GB instead of 64GB. It has 44 reviews that are rated 1-star.