I used this on my Android tablet (Pantech Element and my Galaxy S3 phone).  The S3 took it without an issue but the Pantech required me to format it as FAT32.... it wouldn't read it any other way....  you can search the internet for FAT32 formatter which will format the card as FAT32 using an external card reader within seconds.After doing that, I've been using it for a few weeks now with no problems.  Very nice.  Now... just waiting for the 128GB model.  :)