memory card
memory card, also called storage card (Memory card), is the most common storage device in our daily life. It is a frequently used product in our lives and is often used in mobile phones, digital cameras, security equipment and other products.
Many friends may not know much about the properties of memory cards and how to choose a memory card. If you buy the wrong memory card, the product may not work properly. This article will help you understand where different cards are used. , you will know how to choose when you need it in the future!
directory
1. Memory card classification.
2. Memory card parameter analysis.
3. Common brands of memory cards.
1. Memory card classification.
Common memory cards currently on the market mainly include: TF card, SD card, MiniSD card, CF card , CFast card, NM card .
TF card
1, TF card
TF card (Trans-flash Card)
is called micro SD card (Micro SD card) and is formulated with reference to the relevant standards of T-Flash. These two cards are compatible. TF card It is smaller in size and is the smallest memory card currently on the market. Its appearance size is: 5mmx11mmx1mm, and its volume is about a quarter of that of an SD card.
TF card and TF card sleeve
The SD card sleeve can also be inserted into the SD slot and converted into an SD card for use. TF cards once became the mainstream memory card for mobile phones. Since the built-in memory of mobile phones is relatively large now, memory cards are gradually being cancelled. Expanded functionality. Main applications of
: mobile phones, tablets, driving recorders, web cameras, drones, PSP game consoles and other devices.
SD card
2, SD card
SD card (Secure Digital Memory Card)
was jointly developed by Panasonic Corporation of Japan, Toshiba Corporation and SanDisk Corporation of the United States. It has many features such as large capacity, high performance, and security. Functional memory card. The dimensions of
are: 32mm x 24mm x 2.1mm. SD card is the most common type of memory card and can be used on the most devices.
main applications: digital cameras, laptops .
Mini SD card
3, Mini SD card
Mini SD card (Mini Secure Digital Memory Card)
is developed from SD card, and its performance is not much different from traditional SD card. Mini SD card and SD Like the cards, both have a data transfer speed of 2MB per second. It also has a hardware data write protection switch to avoid the risk of accidentally deleting stored content.
is characterized by its small size, only 21.5×20x1.4mm, which is 40% smaller than the original SD card. Main applications of
: mobile phones, PDAs (handheld computers).
CF card
4, CF card
CF card (Compact Flash compact flash memory)
was originally a data storage device for portable electronic devices. It was first produced by SanDisk (SanDisk) company in 1994 and formulated relevant specifications. However, CF cards have limited capacity, limited operating temperature, strong performance and relatively high price. They were later gradually replaced by other memory cards such as SD cards. Main applications of
: various devices including digital cameras, laptops, desktop computers, , and PDAs (handheld computers).
CFast card
5 and CFast card
are new upgraded standards of the CF specification developed by the CF camp. They use the SATA 3Gbps interface and have the same appearance as the CF card. They are known as the world's smallest SATA solid state drive .
CFast has the same size and appearance as a CF card. It is mainly used to replace the previous CF Card in CF mobile devices that pursue high speed.Therefore, CF cards and CFast cards are basically only used by professional high-end cameras and other shooting equipment. Main applications of
: monitoring servers, subway ticket collection systems, telecommunications operation equipment, facial recognition systems, BOX PC, industrial tablet computer , high-end cameras and other shooting equipment, etc.
MN card
6, NM card
NM card (Nano Memory Card)
is an ultra-miniature memory card created by Huawei . Compared with Micro SD memory cards, the volume is reduced by 45%. The appearance size of the card Compatible with Nano SIM cards, it is more suitable for use as a mobile phone memory card to expand mobile phone storage and increase mobile phone storage capacity. Huawei has transferred the relevant patents and trademarks of the NM card to the Intelligent Terminal Storage Association (ITMA) for free. Main applications of
: Huawei mobile phones and other storage devices.
2. Memory card identification analysis
SD card analysis
1, 170MB/S: is the fastest reading speed of this card.
2, SDXC: is the capacity level of the memory card, which is generally divided into three levels: SD, SDHC and SDXC.
SD: storage capacity below 2GB,
SDHC: capacity 2GB~32GB,
SDXC: capacity 32GB~2TB. The indicator
is just a standard requirement for memory cards. Just pay attention to the memory card capacity when purchasing.
3, 64GB: represents the capacity of the memory card. Due to different algorithms, the actual capacity will be a little less than the logo.
4, SanDisk: brand name logo (SanDisk).
5, Extreme PRO: This is the model name of this memory card.
6, V30: video writing speed is minimum 30MB/S. V stands for Video Speed Class. Generally, there are several categories: V6, V10, V30, V60, and V90. Memory cards of V30 level and above support 4K shooting.
7, I: supports USH (Ultra High Speed) ultra-high speed interface.
8, C10: represents Class10, generally there are class2, 4, 6, 8, and 10, which represent the minimum writing speed of the memory card are 2, 4, 6, 8, and 10MB/S respectively. Class 10 is user-level SD The fastest among the cards. The attributes represented by
9, U3: , C10, and V30 are all the lowest writing speeds. They are just different expressions produced during the evolution of grade standards.
3. Common brands of memory cards.
The following are common brands of memory cards. Friends who know less about memory cards can buy them with confidence. They are ranked in no particular order. They are all big brands that have experienced market verification.
memory card brand
Kingston Kingston.
SanDisk.
SAMSUNG SAMSUNG.
Sony SONY.
Toshiba Toshiba.
Lexar Lexar.
