How to choose a USB flash drive? Consulting master?

It is too complicated. It should be practical! Just buy Kingston's, and I'll teach you how to distinguish between original and parallel imports. The original ones are all A cores. After you get the USB flash drive, the fonts on the side are engraved and feel concave (parallel imports will lose some color to the touch and have no feel). In addition, you have to bend the position with a metal plate, and the original one will not show any performance (while parallel imports will obviously separate metal from plastic), so you should really pay attention to buying a U disk! Be careful not to be cheated.