Instruct: Classify an Amazon review as either positive or negative.
Query: Worked great...for about a week

Like many others, I purchased this for use in my Sony PSP. I loaded it up with some MP3's before getting on an 8 hour flight and it worked great. About a week later it suddenly stopped working. The PSP no longer recognizes it and when I plug it into my laptop I get a message saying the card needs to be formatted. No problem, just format it, right? Well, when I try to format it I get a message saying that the card can not be found.I really liked this product at this price...it's a shame it didn't work.