
Received all 10 and tested for read/write speeds. All ten worked. Used H2test and got about 7.5 MB/s writing and 21.5 MB/s reading over a USB 3.0 port. Recording a 1.37GB MP4 movie was written at around 8.6MB/s, and watching the movie straight from a USB drive was fine with no buffering or stuttering. This is the 16GB version and it's great for the price. Just don't expect them to perform like the best USB 3.0 flash drives.

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