after 4 months in a galaxy s4 the map was suddenly no longer recognized. have tried the card at the PC or another Android device to get connected, but nothing to be done. All images, videos, app data, chat logs .... away. pretty frustrating. the card was not subjected to mechanical stress nor excessively often described, in the period in which it has verabschieded be absolutely even not at all. therefore, I assume the manufacturer and that he deliberately sells products with expiration date, or just cheap junk that is something simply unacceptable. Stay away and would rather resort to Samsung Card, which is even cheaper despite higher write speed than this and has given me for almost a year no problem.