Given an Amazon review, indicate whether it is a 'Positive Review' or 'Negative Review'.

I bought these microSD cards just prior to leaving on a vacation and tried to load them up with music and video for the trip, but both drives managed to jam up during the file transfer and now neither drive will accept new data, delete old data, nor can I format the cards. I don't know if it was the batch or all of these, but I feel like i got shafted with these.
Negative Review