Official Raspberry Pi 32GB A2-Class micro SD card (CE09939)

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I’d recommend paying the extra and buying the larger 128GB version of this card. That one has faster write speeds, and may well last longer. Results with Command Queue on in config.txt dtparam=sd_cqe=on :-

write speed test of card

dd if=/dev/zero of=./TestingFile bs=100M count=10 oflag=direct
32GB 32MBps; 128GB 74MBps

read speed test of card

dd if=./TestingFile of=/dev/zero bs=100M count=10 oflag=dsync
32GB 95MBps; 128GB 91MBps

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Hey @Tim222926,

Thanks for sharing your findings! Always useful to have the extra info.