Instruct: Classify Amazon reviews into positive or negative sentiment
Query: this is a piece of junk

I just bought this massive memory card that holds 1440 pages of memory. I thought it would be a dream to nbever buy a new card again. But it has a major flaw. After a few days THE SAVES BECOME DELETED. What's more the piece of junk doesn't come with instructions. It doesn't tell you how to change pages so I only have 15 pages anyway. If someone knows how top change pages please tell me. Also the website doesn't have the product on it and I can get any help from the people who make it. Please take my advide and don't buy this card as it will only create migranes for you. I put mine in the closet and never intend to use it again. Stick to sony cards. This on isn't worth your time.