did not work when first inserted into my samsung galaxy tab 2 10.1 with ICS. put it in my samsung galaxy sII phone which recognized it and formatted it. then placed it back in my tablet and 57GB are available. should note that my phone was not running ICS at the time, that was yesterday and now it has ICS on it. So not sure if that matters but it does work and i now have a 64GB micro SD card that works in my tablet and pc and phone. so much for the 32GB limit.Enjoy!