Real capacity is 28.87 GB. Average write speed is 9 MB/s. Sequential read speed is somewhere over 34 MB/s. (My computer is too old to measure anything faster.) No errors in 300+ GB of mostly writing and some reading.

These are economy thumb drives. If you want faster speeds, then spend more money.

There is something odd about Kingston "DataTraveler Exodia" thumb drives. I tested three of the 32 GB drives and all were good (assembled in Taiwan). One 64 GB drive was bad (assembled in Thailand): it worked but the performance was so annoying, it made you want to smash it with a hammer. Haven't done enough testing to know if the country of origin really does make a difference. Maybe stick to the 32 GB model for now. I'd tell you where to find the testing software ... except that would be shameless self promotion!