How to distinguish memory cards from high-speed cards and low-speed cards?

You can check whether there is a C4 or C6 logo on the SD card. Generally speaking, SD cards above C4 are high-speed SD cards.

The difference between the so-called high-speed card and the low-speed card is that they use different NAND flash memory. The so-called low-speed card uses MLC NAND flash memory, which is mainly produced by Toshiba and Sandisk. The high-speed card adopts SLC NAND flash memory, which is mainly produced by Samsung.

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Just like DIY computer hardware, memory cards also have compatibility problems. There are also some incompatibility problems between different brands of memory cards and digital cameras. Mainly manifested in the card reading time is too long, the access speed is longer, or there is a crash. Therefore, when purchasing a memory card, you must clearly remember the memory card model corresponding to this machine. It is safer to try the machine yourself.