Default Issue with MicroSD

So I just got a Kingston Class 10 64GB SDXC Card

I generally use Wifi File Transfer Pro to xfer stuff to extSd but in this tablet, its just dies down after a certain %
I thought it might be the SD card, then I inserted my Patriot Class 4 32GB card and same thing

I tried Air Droid and WTF, for both it shows ExtSD card is 11.76GB only!

Is there something wrong? or thats how kitkat is?