Instruct: Classify Amazon reviews into positive or negative sentiment
Query: VERY Dissatisfied

I bought TWO of these and they DO NOT WORK. They WILL NOT format on a PC or a MAC. My friend, a technology teacher, tried to format them and they would not format or erase. They would not accept any files. I bought a replacement, "SANDISK Cruzer 8GB" and it works GREAT. It's FAST and much smaller. My best choice.