Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unreliable Memory Card

I had this Playstation 2 memory card for 4 months. Our family played and saved approximately 50 different PS2 games on this card, and it didn't run out of memory. All of a sudden we can not load our game saves from this card. We can not format nor reset this memory card. This card is now useless.