Kingston 64GB Micro SDXC Class 10 Memory Card

Kingston makes no outright mention of the performance of its microSD products, except in the specsheet where it mentions the minimum write speeds that the cards can do. The Kingston SDCX10/64GB shows a 45.5MB/14.9MB per second read/write performance. Note that to meet Class 10 specification, a flash memory device should deliver at least 10MB/s write performance in most situations. The Kingston SDCX10/64GB delivers almost 15MB write performance at 64KB file sizes and upwards, which is usually the standard file sizes these cards will encounter giving us a good glimpse of what to expect from the microSD card. On to Crystal DiskMark.