Instruct: Classify Amazon reviews into positive or negative sentiment
Query: worked for a while

I bought this card to go with my Nikon 4300. It worked fine for about 6 months. Now, although I can continue to take photos, I can't get them off the card my any means. PC can't read or even format the card.Don't waste your money here!As an update, I went to the Viking website and noted that they have a 5 year warranty. It was very easy to return, and Viking sent me a new one within a few weeks. So far, so good...