I almost sent this Fake back when I noticed a 40 MB read/write, but then I discovered that in fat32 the speed reaches 80 (as seen on the screen), and after just a few seconds of using modified firmware, I was able to attain 100+ when writing to exfat (likely due to the cache). Thus, the exfat speed is reduced to around 40, and sometimes even lower. Those. Half the stated pace in both reading and writing is sufficient. Perhaps it's a mobile device issue.
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