SD card is a memory card based on semiconductor flash memory. The standard volume is 24 mm× 32 mm× 2. 1 mm, and the weight is only 2 grams. SD card has the advantages of large capacity, fast data transmission speed and strong security (anti-write lock function). SD card is widely used and has now become the memory card with the highest market share.
As the name implies, miniSD card is a small memory card that is "slimmed down" on the basis of SD card. MiniSD card can be converted into SD card through special adapter. It should be pointed out that the miniSD card does not have the anti-write lock function like the SD card. MiniSD card is mainly used for windows mobile and S60 third edition smartphones.
MMC card is an old memory card and can be compatible with SD card devices. For most mobile phones with SD cards, MMC can be used normally. The overall size is about 32 mm× 24 mm× 1.4 mm, which is the same as that of ordinary stamps. The weight does not exceed 2 grams, and the portability is strong. The working voltage of MMC card is divided into 1.8 volts and 3.6 volts, which should be paid attention to when purchasing. The transmission speed of MMC card is relatively slow, and MMC card is rarely used in new mobile phones.
MicroSD card
MicroSD card, also known as TF card, is also a new memory card improved from SD card. Only a quarter of the size of the SD card, it is the smallest memory card at present. Due to its small size, the maximum capacity of microSD card is limited. Some memory cards have reached the capacity of 8GB, while the microSD card with the largest capacity on the market is only 2GB. In addition, the microSD card has a built-in copyright protection management system, which can effectively curb malicious resources.
Remote multimedia card
RS-MMC card, also called MMCmobile card, is a small MMC card developed for mobile phones. RS-MMC card supports dual-voltage operation and has better compatibility than MMC card. It is superior to MMC card in transmission speed and stability, and is mainly used for Nokia's S60 second edition smartphone.
MS card
MS card, commonly known as memory stick, is a memory card developed by Sony. Divided into long sticks and short sticks, short sticks can be transformed into long sticks with adapters. At present, MS cards used in mobile phones are all short sticks, which are special for Sony Ericsson mobile phones. MS card has fast reading and writing speed, high reliability and dustproof.
Miniature memory stick
M2 card is an improved version of MS card, which is smaller and more suitable as a new generation of mobile phone memory card. The size of M2 card is only a quarter of that of MS card, which improves the security and transmission speed, and supports dual-voltage operation, with lower power consumption than MS card.
Memory cards of Nokia mobile phones generally use Mmc, and mobile phones often contain 64m and 128m.