Alsina S. Jorge
No problem with storage and speed. I only had some difficulties to insert it in my card Kingston reader: http://www.amazon.com/Kingston-Flash-Memory-Reader-FCR-HS219/dp/B00109Y2DQ/ref=sr_1_1?ie=UTF8&qid=1356544341&sr=8-1&keywords=card+reader I believ due to a sticker covering something in one of the sides. Other microSD do not have this kind of problem with that reader.