V. Aub
I use this in my Galaxy S3 so that I can carry all my MP3s that are on my iPOD classic (45GB).The only complaint I have is not with this unit, but with smartphones in general.  They are still to sensitive to be used as a true mp3 player replacement.  If you are not too careful, you may crack the screen on your phone if you try to use it as an all-purpose media player.My ipod classic is five years old and it has yet to have its screen crack on me.  It definitely hold up better at the gym than my phone.  Anyway, this SDXC card is great.