Extremely contant, 128 gigabytes in a box no bigger quun mobile phone with a weight 10 times lighter and that one can put in the dune shirt pocket without that it bothers you, this is happiness.
Disk performance, standard USB 3.0 transfer speed writing. The least, this is a cord too rigid, really soft and they could have for the price we put a small carrying pouch like suede. Otherwise I strongly advice.