I recently tested CrystalDiskMark7 on several 32GB Class 10 USB cards I had on hand, including several well-known brands, some other cheap cards and this one. Netac was the fastest, especially for random reads and writes. They were significantly faster in all categories than other inexpensive A1 cards I've tried. I see a performance difference with my Raspberry Pi, especially the 4B, since it can take advantage of all the memory I/O speed you can give it. I'm taking off one star for the packaging just because it would be nice if they came with some sort of case, but for the price I really can't complain.
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