I'm testing an accessory that is supposed to be able to read microSD cards larger than 32GB if they have been formatted in FAT32, so I have a 64GB/exFAT card I'd like to reformat with FAT32. Does anyone have any experience with this? Do you have an application you'd recommend? I'm nervous that I'm going to ruin a $40 card with this experiment. I can find options on the Web, but I'm hoping someone can point me toward one they know works. For example, there's Fat32Formatter: http://tokiwa.qee.jp/EN/Fat32Formatter/ But I know nothing about how reliable it is. I'd be doing the experiment on a Surface Pro 2 with Windows 8.1, if that makes a difference. Any assistance would be much appreciated.