Received the Micro SD card in record time, Bravo Amazon, but for the commissioning of the card it was too long. For an MP3 player, I had to format the card in FAT32 format can not go 64 with windows7 who offered me an unrecognized exFAT in my player. So I bought a map of 64 go and I could only use it 32 go. I changed adapter it was the same problem. Fortunately I found this software that has the job perfectly so I have 64 now go to my player. Phew! The identity of the free sofware found on the net: guiformat which allowed me to properly format the card [...]