Amazon Customer
I've had this card for some time now and I've only had one problem with it and I believe that problem to be with my phone. The card's formatting became corrupted and while I could still copy to and from using my computer, my phone didn't recognize the card. Copying the data off, formatting the card, and copying the data back onto it fixed the issue. It's really nice to have 64GB's of extra data storage on my phone.