Bought this card for my Galaxy S4 and after installing it and loading my music, the card was randomly ejecting itself. After like the 3rd ejection of the morning, the phone reported that the card needed to be reformatted because it was damaged, so I reformatted. The random SDCard ejection and Damaged card kept coming up. After googling, I read that the Galaxy series phones are known to have compatibility issues with SanDisk cards and its a hit or miss, some phones have no issues. I have replaced this card already, which Amazon, shipped me a 2nd card within a few days, but the same problems arise. Not sure if I should switch to a different brand, but this card is definitely useless to me for the time being. Maybe I can give it away to a friend who doesn't have an S4. :/