FAT32 format required. I've been looking for a way to format this to 64GB but online programs seem difficult to use and have added extensions and other permissions to my computer that I'd rather not use and it took a while to get that out of the way me tried to remove. I was debating whether to hire a geek for this or just return 64 and get 32. (If you were an IT savvy person maybe this could work.) Returned it for 32GB. I have suggested to SAMSUNG that they add this information to their product description. Saved me a few wasted hours.
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