Professional Mobile Ultra SanDisck MicroSDXC 64GB (64 Gigabyte) Card for Samsung Galaxy S3 LTE Smartphone with custom formatting. (XC Class 6 Certified at 30MB/sec) Professional Mobile Ultra SanDisck MicroSDXC 64GB (64 Gigabyte) Card for Samsung Galaxy S3 LTE Smartphone with custom formatting. (XC Class 6 Certified at 30MB/sec)