I've got a 64GB micro SD card in my phone. It has been quite reliable so far and has performed well for 6 months. I'd like to replace it with a high quality U3 micro SD card that has a 128 GB capacity. It's hard for me to even understand how you could fit 1 GB into such a tiny space. 128 GB seems preposterous and 200 GB or 256 GB even crazier. Are we approaching atomic levels? I have to question whether reliability suffers in any significant way as you go larger with micro SD cards and would love to know the answer.