Has pros: For a long time I chose a flash drive for DJI mavic, looked on the Internet for which one would be the most optimal, as a result, I settled on Sandisk extreme pro 128GB. With its cons. Disappointed that it did not live up to speed expectations, measured on a good card reader from ugreen 3.0 on two programs

If you choose additional memory for a smartphone, I think this memory is ideal - low timings for both random and sequential write / read. The write speed is noticeably higher than on the built-in memory. The Samsung Note 8 smartphone is no longer young, but it accepted the modern card without objection and with full volume (although it is stated that it does not understand above 128GB).