Samsung PRO Endurance microSD 128GB (SD Adapter) MB-MJ128GA/APC is a professional grade and durable flash memory microSD memory card designed for use with digital cameras especially DSLRs as well as premium smartphones. It can read and write with blazing fast speeds and offers first class transfer rates. You can transfer files especially 2K and 4K resolution movies rapidly. It is built for all kinds of environmental conditions and is water/temperature /x-ray /magnet proof. It offers 32GB storage and provides 100MB per second read speed and 30MB per second write speed for super-fast transfers.