Joe Mama
Amazon ran a good deal on this 64GB microSDXC, so I jumped on the bandwagon.  When it arrived I snapped a few photographs to test it out and it worked well...until I tried to retrieve the files.  I don't know how, but it became corrupt and no longer would reformat or function in any of my devices.  I exchanged it for a replacement through Amazon and the new one works beyond my initial observations.  Browsing seems much faster than previous SDHC class 10 cards.  Thank you Amazon for your immediate exchange.  highly recommended for today's on the go data storage.  *(original review was 2 stars, but after Amazon's immediate replacement and great customer service I re-rated to 5 stars.)