The USB reader is slow but the card seems ok too be. It appears to be a true 64GB card and the read and write speeds aren't bad. When connected to a decent card reader, I got about 97 MB/s sequential read, about 8 MB/s random read, about 33 MB/s sequential write, and about 5 MB/s random write. With the card reader enabled, the speeds were around 21 MB/s, 7 MB/s, 17 MB/s and 5-6 MB/s (don't know why random writes with the card reader were slightly faster - maybe a bit strange). happened during one of the tests). I probably wouldn't trust this card from an unknown brand with anything important, but as far as I can tell the card is fine. The card reader is slow, but it has USB and micro USB ports, as well as SD and micro SD card slots, so it's not useless.
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