Flash drives are not bad and all 5 have worked so far. But I gave it 3 stars because everyone was copying so slowly that I was frustrated. Also, you may need to know how to format flash drives. I had several email exchanges with the supplier who was very helpful and quick to respond. In addition to my comments above, I'm changing 3 stars to 4 stars for the following reasons: Now that I've used them a lot, I've found that they work, well, speed aside. If you don't care about speed, the price and quantity make this a good buy.
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