Bought a modest bundle of books that would fit perfectly on one of these. The only problem is that the USB became unusable after a week. It would indicate that it is empty (no folders or files are visible) but at the same time 85% full. I tried to recover the files as best I could and only got error messages. Luckily I still have access to the site to re-download the books I bought. I don't trust this product to give you anything that I would truly regret losing. It's cheap though, so if you're just using them to transfer some of the pictures you've backed up then I don't think it's too much of a game.
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