Born Old
I bought this to use as expanded storage in my Asus Transformer Book T100 but it was unstable and I have had to return it. Although the tablet would see the card when it was first inserted there would be errors trying to copy files onto it and then Windows would indicate that it needed formatting. If I tried a quick format then everything seemed to be OK but the instability would return as soon as I tried to copy data to the card. If I tried a full format it always failed.I gave it two starts because it seemed to work using the supplied SD adapter in a Windows 7 laptop. I was able to do a full format on that but, when I put it back into the tablet, the problems continued. The tablet is compatible with SDXC cards and, when I tried a different micro SD card in the tablet, it worked fine so I assume it was a problem with this card.