Review on 🔑 EASTFUN 6 Pack 16GB USB 2.0 Flash Drive Foldable Storage Memory Stick Thumb Drive Pen Drive Jump Drive Zip Drive Swivel Design, Assorted Colors (Rose Gold, Red, Blue, Black, Green) by Brian Cruz

I don't know what's wrong with them but they either copy incredibly slowly or don't copy at all. I have several portable apps that I carry around and they weigh just over 400MB. When you try to copy to these flash drives, they either fail (the window closes and they no longer appear in Explorer) or copy very, very, very slowly. It takes about 5 minutes to record 500MB. In fact, I'm writing and finishing this review before the files are copied to disk because this time it actually works. The transmission speed is high. They barely keep 1 MB as a transfer rate. A good example of cheap didn't work.