RAS very good card for use storage expansion. Warning speed 24mo / s advertised is still reading the content (not follent wasps ...) class, C6 here means minimum 6mo / s write / record (knowing that for a classic non-UHS map c is maximum 25MB / s writing or reading) So if it is to transfer photos taken of your smartphone is perfect, except for a Sports Camera Type GoTruc, turn to the UHS Class cards or better -I UHS-II very efficient. Finally, to earn a little space and be read by all devices in the exFAT format;)