Review on Kingston DataTraveler flash drive 100 G3 256 GB, 1 pc. black by Eimei Suzuki ᠌

I bought two for 64 and 128 GB. 128 GB. I was pleased with the recording speed of about 50 MB per second. and reading 130 MB. sec. 64 GB. This is just awful: Recording 13-14 MB per second. Worse than USB 2.0. I checked my own, the same old one, for 32 GB. write speed 30 MB. in sec. I don't understand why there is such a difference in speed? I'm trying to get it back. I do not advise you to purchase 64 gigabytes!