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SD Card Specifications

πŸ“… 2021-Feb-02 ⬩ ✍️ Ashwin Nanjappa ⬩ 🏷️ sd card ⬩ πŸ“š Archive

Recently, I had to choose microSD cards for my car’s Yi Mini dash camera and when I plugged in an old microSD card it spewed an error demanding a UHS SD card. And I also had to choose a suitable microSD card for my Raspberry Pi 3 Model B+ board so that it would be fast enough to use as a Ubuntu system. When I looked into buying microSD cards for these two applications, I realized I had no idea what the various symbols on the cards meant.

Thankfully, the SD Card Association has a good website that clearly explains what the symbols mean. Collected below is a summary of what I learnt from looking at the Developer information and the SD Standard v8.0 specification:

Symbols on a microSD card