firmware update 1.4 1.3 sd card

Hi everyone. I need some help. I have been running 1.2.x for sometime now and, after reading that things were pretty stable with 1.4, decided to upgrade to 1.4. I knew I had to go through 1.3 first. But I have had a devil of a time doing that. I had a Class 10 MicroCenter 16GB card that was...