I was concerned that MicroSD_XC1 Class 10 would not work in my HTC Inspre_Android ver 2.3.5. However, despite online reviews stating that you must format the drive with FAT32, it was not necessary. An expert advised that the XC is Linux based, but so is the Android Operating System. Therefore, I just plugged it in and the phone immediately recognized 64GB. I copied my data from a 16GB MicroSD to the 64GB MicroSD_XC1 and mounted to my phone. Holy Smoke...what to do with all this memory!!! I went from 5GB available space to 59GB available space...maybe I'll shoot a small movie! The adapter is pretty convenient too. Highly recommended, but don't format in FAT32 unless it doesn't work on your model.