Owners of quality photos housings (not required on entry level), this card offers Transcend write 30 MB / s. This is fine although other more expensive rises above 90 mb / s. What is this for? and many burst mode, when to save dare dare clichés, this is where the writing speed becomes meaningful. Class 10 "I", again an excellent choice for demanding amateurs. No problem encountered since my purchases, the data is fully backed up, recognized the card 1 hit whatever the PC used. Be careful when buying an SD card, all look alike, but take good care, it is only in appearance. Carefully consider the "class", the write speed and the "I" class. By cons, Make sure your drive is not too old, and is well SDHC compatibility.