Purchased in November 2012 (less than 18 months ago)  for use in my then new Samsung Galaxy S3.  It has never been removed from the phone until today when it failed.  Since the phone is still fine and the memory card is stored well inside, it's safe to assume this card has suffered no abuse.  Today, the card is totally unreadable.  It can't be formatted by the phone.  The PC doesn't see it at all.  It's dead, Jim.  I'll be contacting SANDISK about warranty today.UPDATE:  I've updated this from 1 start to 4 because although it failed, SANDISK is replacing it at no charge.  Sometimes stuff fails. If a manufacturer will stand by it, that speaks well.  Nice that because I bought it on Amazon I could search my orders and find the original invoice to use when I contacted them.