SDXC Card 64GB Lexar Professional 600X arrived with four days in advance ....! (As usual SUPER Amazon). SDXC Tested on a 77 alpha 24 Mp (and 6 Mp) JPEG and unlike my card Transcend 64GB Class 10: I do not have the message "card not write short" is FINALLY .. card is faster than the Transcend (90 Mb / s to 25 Mb / s for Transcend) and I finally reactive device. I wanted to save money by purchasing the Transcend .... and I ended up buying this card, which itself gives full flow to my Alpha 77. Adopted .. !!!