Samsung starts production of its high performance 32GB Class 10 microSD memory card with advanced data transfer speeds that support the performance requirements on 4G smartphones. The 20nm class microSD card has a class 10 speed rating suitable for seamless data storage and transmission of full HD videos. It offers 12MB/s write and 24MB/s read speeds, which are more than double the maximum write speeds of a class 4 rated 32GB microSD card.