If the current situation in the memory card market is not clear enough, look at the CF family of products, it is really mixed feelings. CF card was once a big winner in the memory card market and OEM market, it once occupied half of the entire memory card market, and its strength made SM card used to fight CF card even colder in the market performance. But then with the emergence of MMC and SD card, the CF card market is slowly eroded, digital equipment is getting smaller and smaller, CF card is becoming more and more inappropriate, it slowly withdrew from the small digital camera market, and slowly withdrew from the PDA device market, and finally, even the laptop built-in card reader is also replaced by CF compatible with a variety of small card reader. But only do not support CF card, CF card like into the old age, although the body is still tough, but the spirit has been far less than later life.