This Micro SD card really is 64 GB and Class 10.  Too many bogus devices out there, but this is the real McCoy.  Tested with 3 different Android SD Card Testers and they all report Class 9-10 read/write.The only problem is the SD adapter did not work so I had to use another one I had.  Other than that, this is a great Micro SD card at a good price.