Flash card is a memory that uses flash technology to store electronic information. Generally, it is used as a storage medium in digital cameras, palmtop computers, MP3 and other small digital products, so it looks like a card, so it is called a flash card. According to different manufacturers and different applications, flash memory cards include SmartMedia(SM card), Compact Flash(CF card), MultiMediaCard(MMC card), Secure Digital(SD card), Memory Stick (memory stick), XD-Picture card (XD card) and MICRODRIVE. Although the appearance and specifications are different, the technical principle is the same.

2. Flash card:

Flash memory card is a small card with cartoon characters printed on its surface. In the1990s, flashcards were all the rage in Hong Kong, and many small shops had machines selling flashcards. It has become a trend for students to draw, receive, exchange and trade flash cards.