Hello everyone, I am 100% at dusk, TF card, SD card and CF card are the most common three commonly used card storage devices, many friends often choose one at random when purchasing, but when using it will find that its performance and characteristics can not meet their own needs, today I will bring you several memory cartridge specifications and purchase recommendations.
Well, without further ado, let's drive.
Introduction to the specifications of TF cards and SD cards
Because the standards for TF cards and SD cards are formulated by the SD Card Association (SD Association), the specifications of the two cards are basically the same, so here we put them together to introduce them.
The difference and connection between TF card and SD card
TF card can make a cameo appearance SD card through SD card holder, so many friends ask me what is the difference between TF card and SD card except size.
▲ Simply put, the microSD card is collected after the SD card organization, and it is called the TF card before the adoption, and the micro is "small" meaning, so at present, TF card and SD card in addition to the gold finger pin number is different, SD card has an anti-write switch and TF card does not, there is only a difference in size. At present, the specifications used by SD cards and MicroSD cards are basically the same, so let's introduce them together.
SD & MicroSD card protocol with total bandwidth
At present, SD cards have UHS-I. and more advanced UHS-II., UHS-III. bus interface, the speed from bottom to top, and then there is PCIe bus protocol, but daily we can not even see the memory card of UHS-III. bus interface, here will not do too much expansion, only the common UHS-I standard (total bandwidth 104MB/s) or UHS-II standard (total bandwidth 312MB/s) in daily use is introduced.
Identifying UHS-I and UHS-II standards is as simple as looking at the number of gold fingers on the back of the card:
▲UHS-I. standard SD card gold finger is 9 pins, while UHS-II standard SD card gold finger is 17 needles.
▲UHS-I. standard micro SD (TF) card gold finger is 8 pins, while UHS-II standard micro SD (TF) card gold finger is 16 needles.
UHS-I. Official Overclocking
The total bandwidth of the UHS-I specification cannot meet the needs of daily work, and UHS-II memory cards may be slightly more expensive than budget, which happens from time to time, in order to solve this problem, mainstream memory card manufacturers have invariably studied official overclocking technology.
Official overclocking technology is a technology that can make the read speed of UHS-I. memory cards exceed the total bandwidth of UHS-I., and can produce a more cost-effective SD card product with read and write speeds between the total bandwidth of UHS-I. 104MB/s and the total bandwidth of UHS-II. 312MB/s to fill the product gap in this range.
▲ For example, SanDisk named this technology as Xun Lightning technology, which can make UHS-I. specification SD cards with a total bandwidth of only 104MB/s run to a read speed of 200MB/s, almost double the original total bandwidth, when I wrote similar articles two years ago, this technology can only be overclocked to 170MB/s, which shows that SanDisk has been polishing and improving this technology.
▲ Simply put, the UHS-I. official overclocking of Xunflash technology as an example, only need to use SD card and card reader that support this technology at the same time, you can play a read and write speed far beyond the original bandwidth.
Application Performance Class
In addition to sequential read and write speeds, minimum read and write speeds are also important for SD cards
This part is mainly for large files continuous read and write speed drop regulations and random read minimum read write minimum speed regulations, we all know that memory cards, even U disks, SSDs, etc., in the continuous reading and writing of large files, will be due to heating and other reasons and speed drop, this specification stipulates that in the case of a variety of factors drop, can maintain the lowest speed.
▲ Now there are only two levels, A1 and A2, and their requirements for the minimum speed of continuous average write are 10MB/s, and only the minimum speed requirements for random read and write are different.
TF card and SD purchase recommendation
Well, having said that, let's start the product recommendation.
SanDisk Extreme High Speed Mobile
▲ Extreme High-Speed is SanDisk's main cost-effective series, this Supreme High-Speed mobile version, starting from 256GB capacity, has a high read speed of 150MB/s, and has reached the A1 application performance level, with good random read and write speed and minimum guaranteed write speed.
▲ This TF card is more suitable for mobile phones, tablet expansion, storage of film and television files, or for Switch, SteamDeck and other handheld game consoles to provide larger game storage space, although the writing speed of this memory card is slightly lower, but whether it is watching movies, or playing games, is testing the reading speed of the memory card, and the reading speed of this memory card 150MB/s can very well meet the needs of the above devices, and the price is very cost-effective. There is also a 10-year after-sales commitment from the big brand SanDisk warranty, and it is very assuring to buy.
SanDisk Extreme Mobile
▲ Supreme high-speed is mainly super high cost performance and high read and write speed, and for friends who need ultra-high write speed, I recommend this supreme extreme mobile version, its read speed and write speed are very high, 256GB and above versions have 190MB/s sequential read speed and 130MB/s sequential write speed, enough to meet the needs of mobile shooting equipment such as drones, action cameras, handheld gimbal and other mobile shooting devices for real-time recording of 4K video.
▲ In addition, this memory card has reached the A2 application performance level, which is also very suitable for mobile devices to install applications, of course, Android devices that support TF cards and allow applications to be installed in them are becoming fewer and fewer.
▲Finally, as a high-end TF card owned by SanDisk, the Supreme Extreme Mobile version has a lifetime replacement repair under limited conditions, which is extremely reassuring to use.
Of course, here to emphasize data security, memory card and SSD similar, once damaged, the data basically can not come back, and the warranty is only to ensure the storage medium, the data stored in it is not within the scope of the warranty, so must only the memory card as a mobile storage medium, important data must be multi-media, different locations of cold backup preservation.
SanDisk dashcam & memory card for security monitoring
▲ The two models recommended just now emphasize sequential reading and sequential writing speed, and the next TF card emphasizes the driving recorder & security monitoring memory card that can be stably and continuously written even in extremely harsh environments.
▲The first is the continuous write function, this memory card can continuously write 4K HD video 7x24 hours, which is very suitable for use as built-in storage for surveillance cameras or dashcams.
▲ In addition, it has a super high write life, the 128GB version has 10,000 hours of Full HD video writing speed, the minimum guarantee of 7x24 hours for 416 consecutive days, and in fact, most cameras will not record 7x24 hours, the service life is longer.
▲In addition, its reading speed is also relatively high, 100MB/s, and it can be quickly backed up to the computer or mobile hard disk after it is full.
▲ In addition, it has the ability to use stably in harsh environments, such as in the hot summer, if the car is parked in the sun for a few hours, the temperature inside the car often has to be 50 °C or even higher, and in the northern winter, the temperature in the car is minus 20~30 °C is often visible, regardless of hot or cold, the memory card needs to start storing the video recorded by the dashcam at the moment the car starts, therefore, strong adaptability to harsh environments is also an indispensable attribute of the monitoring card.
▲Finally, because of the particularity of the use scenario, the memory card for driving recorder & security monitoring only has a 2-year warranty.
Here to focus on a sentence, monitoring use do not be greedy for cheap use of ordinary memory cards, if it is not important when the memory card is broken, it is good, if the memory card is damaged and the loss of key evidence, it is really not worth it, just imagine if the traffic accident is responsible, if you open the dashcam and find that nothing is recorded, how unfortunate it will be. So, the important thing again, don't be greedy for monitoring purposes with ordinary memory cards.
SanDisk Extreme Ultra Digital Camera memory card
▲ In terms of cameras, it is recommended to use SD cards, not TF (Micro SD) cards and card sleeves, and here is limited to recommend UHS-I. specifications of the extreme ultra-fast version digital camera memory card.
▲This SD card has a super high read speed of 200MB/s and a high-speed write speed of 90MB/s, which is enough to meet the needs of 4K video photography and high-speed continuous shooting.
Here is more to say, the choice of SD card, to follow the camera, some friends will see UHS-II. ultra-high reading speed and directly place an order to buy, only to find that their camera only supports UHS-I. (for example, my Sony A6400 supports UHS-I.), and then the high-end SD card can only run in compatibility mode under the bandwidth of UHS-I., resulting in Lv Bu riding a donkey, spending a lot of money in vain.
▲Finally, the memory card of the Supreme Ultra Extreme Edition digital camera comes with two-year data recovery software to further ensure data security, and also supports limited lifetime replacement, so unless the memory card is lost or physically damaged, it can be replaced with a new one, which is very safe to use.
SanDisk Extreme Super Speed digital camera memory card
▲ For higher-end cameras (such as the recently popular Sony Alpha 7R IV), it supports UHS-II SD cards and has higher storage bandwidth, so here is recommended the Supreme Super Speed UHS-II camera memory card.
▲Ultra UHS-II camera memory card has a sequential read speed of 300MB/s and a sequential write speed of 260MB/s, and the video speed level is as high as V90, which is enough to meet the memory card requirements for 4K/8K video recording and RAW format photo continuous shooting, and it can be said that the performance is very powerful.
▲This memory card also supports 2-year data recovery software and lifelong replacement repair under limited conditions, which can be used with peace of mind.
SanDisk Video Companion 3-in-1 card reader
▲ After recommending TF card and SD card, here are two more card readers, the first is this image companion three-in-one card reader, which supports TF card, SD card and CompactFlash card reading.
▲ It adopts Type-C interface specifications, thin and light notebooks can also be used, in addition, SD card and TF card can run the bandwidth of UHS-II., and CompactFlash card slot 160MB/s reading speed can also meet the demand, is an all-in-one card reader with strong applicability.
CFast card and CFexpress card purchase recommendation
CompactFlash (CF) card is a memory card first produced by SanDisk, followed by other manufacturers, currently on sale CompactFlash (CF), CFast card and CFexpress card, the three cards have been physically isolated by size and interface, and are not compatible with each other, so it can be considered that three different cards, or that sentence, follow your camera, don't buy wrong.
Because the original CompactFlash (CF) card is on the verge of obsolescence, in addition to the old camera supplement memory card, the new camera will no longer use this standard, here is no longer recommended, only CFast and CFexpress cards are recommended.
SanDisk CFast 2.0 Extreme Extreme Edition SLR CFast 2.0 card
▲First of all, recommend a CFast 2.0 protocol supreme ultra-fast version SLR camera memory card, CFast 2.0 is SATA-III. bus protocol, so it can support faster read and write speed, this CFast card has a sequential read speed of 525MB/s and a sequential write speed of 450MB/s, compared with UHS-II SD card read and write speed have obvious advantages.
▲This extreme super speed CFast 2.0 card also supports VPG-130 specification (minimum write speed 130MB/s), so even if you record cinema-grade 4K video, there will be no frame skipping, which is enough for some video and photo productivity.
▲Finally, lifelong limited conditions to replace repair also make everyone feel at ease.
SanDisk Professional ProReader CFast card reader
▲ CFast card reader, here is a SanDisk Master ProReader CFast card reader, after all, the use of CFast 2.0 card camera, basically in terms of productivity needs, with a PROFESSIONAL suffix is also reasonable.
▲This card reader adopts a high-grade metal shell, which can fully ensure the heat dissipation of the CF card when continuously reading and writing, and will not drop due to overheating, greatly increasing the efficiency of file transfer.
▲This card reader is USB 3.2 Gen 2 protocol, with 10Gbps bandwidth, easily running the total bandwidth of CFast 2.0, and also supports SanDisk Master's PRO-DOCK 4 docking station, which is very powerful.
SanDisk Ultra Extreme SLR CFexpress card
CFexpress card is PCIe lane, divided into Type-A (1 PCIe lane), Type-B (2 PCIe lanes), Type-C (4 PCIe lanes) three specifications, of which Type-A is basically only Sony itself and itself playing (such as the flagship Sony Alpha 1 camera is still using Type-A CFexpress card), The Type-C CFexpress basically only appears on industrial-grade equipment, too high-end and we can't touch it, so here is only a Type-B class supreme ultra-fast version SLR camera CFexpress card.
▲ The CFexpress card of the extreme ultra-fast version SLR camera has a reading speed of 1700MB/s and a writing speed of 1400MB/s, which can belong to the high-end in all camera memory cards.
▲Such a high writing speed makes it not only able to meet the recording needs of ordinary 4K/8K video, but also to meet the writing needs of high-speed shooting (slow-motion photography), a proper and reliable productivity tool.
▲ It also supports some XQD cameras, this needs to consult your camera's customer service specifically, and may need to upgrade the camera firmware, here do not do too much expansion, friends in need will naturally find a way.
▲Finally, the high-end card comes standard with a lifetime replacement repair is essential, and it also has a one-year recovery software use right, which is a very reliable CFexpress card.
SanDisk Ultra Ultra CFexpress card reader
▲ About the CFexpress card reader, here is the SanDisk Ultra Super Speed CFexpress card reader, which has a maximum reading speed of 1250MB/s, although it is not as good as the previously recommended Supreme Ultra Extreme SLR camera CFexpress card up to 1700MB/s reading speed, but its price of only about 400 yuan is very close to the people, and has a two-year warranty, which is very cost-effective.
summary
This article systematically introduces the difference and connection between TF card and SD card, as well as CFast, CFexpress card specification differences, and at the same time made a certain purchase recommendation, SanDisk as a world-renowned storage equipment manufacturer, its product quality and after-sales guarantee are trustworthy, you can buy according to your own needs, after all, suitable for yourself, is the best.
Well, that's all for this article, I hope it helps you, I'm 100% Dusk, we'll see you next time.