I put this in my Galaxy Note II and put a bunch of music and PDFs on it.  I also used it to save videos and photos.  It worked well for about 2 months then, on Christmas Day (today), it said that there was an error reading the card and the card was now blank.  My phone no longer recognizes the card and even putting it into its adapter and sticking it in the SDHC reader of my laptop doesn't work.If this is SanDisk Quality, then I am not impressed.  I am going to have to deal with their warranty replacement but I'd rather have a refund than get another card that might fail after 2 months...