A. Marte
I bought this on August of 2013.  As of April 2014 the card stopped functioning.  It can still be read, but the writing capability is gone.  That's less than one year.  I'm extremely disappointed in the longevity of this card.  My usage of it has been on my Galaxy S4.  I have about 40Gb of data in it.  Guess I'm going to have to look for another card that has a longer lifespan than this one.