Instruct: Classify Amazon reviews into positive or negative sentiment
Query: suddenly I have a 12 Gbytes card! :-(

I recently purchase this product 2 months ago, works fine for 1 month; but suddenly it was 4 gbytes lost!.I don't know what happen, now I'm the proudly owner of a piece of High Technology with 12 Gbytes working and 4 Gbytes hidden.It was the last time that I bought something from this brand.