Chip shortage obviously did not affect NAND, whether it is SSD or memory card, have maintained the previous rhythm of capacity increase and price decline. Compared with the previous two, the speed increase of MicroSD cards is considerable.
Space limitation is a watershed in which memory card and SSD performance/capacity go in different directions. Of course, there are also uses behind the influencing factors. The increasing built-in storage capacity has led to a significant decline in smartphone demand for large-capacity memory cards, especially MicroSDs, but demand for tablets as well as drone/action cameras has increased faster.
In addition to capacity, these application areas that require high capacity of MicroSD memory cards also have higher requirements for the performance of memory cards, especially video shooting with 4K or even higher streams, which puts forward high requirements for the continuous read and write performance of memory cards. However, the larger the capacity of the memory card using the same technology, the lower the read and write performance, which means that the performance of the memory card should be doubled while the capacity is increased.
The performance of the new SanDisk Extreme MicroSD memory card has been upgraded to A2 level and meets speed levels such as V30 and U3. Along with the included SD card adapter, it is compatible with the SDXC I (UHS-I) interface standard, i.e. compatible with today's mainstream PCs and portable HIGH-definition video devices, and can be used without switching to a card reader, which is important for memory cards that often need to be plugged in and swapped and exchanged.
The performance of this generation of Extreme MicroSD memory cards has been greatly improved, surpassing the previous generation of Extreme PRO MicroSD cards, and the gap between the characteristics of the higher-end new generation (A2) Extreme PRO series is very small, from the nominal indicator alone, in addition to the slight difference in peak speed, the other key indicators are exactly the same, but the price difference between the two is double. Extreme MicroSD is very good value for money.
Just need to pay attention to the specific product model, SanDisk maintains the Product Brand of Extreme, the design of red and gold, and there is only a performance level on the card without specific speed, so pay special attention to the model information on the outer packaging of the product when purchasing, so as not to buy the old product.
The number of SDSQXA1 is not all A2-level Extreme MicroSD series memory cards! The last "MA" is the core symbol, and the last generation of products is "GN". SanDisk launches products for different markets with different suffixes, and ZN6MA is a domestic licensed code.
The new generation of Extreme MicroSD series memory cards is available in a variety of capacity options from 32GB to 1TB, with only the 32GB version being SDHC and the rest being the SDXC standard. In addition to the nominal speed of 90MB/s for writing and 160MB/s for reading, SanDisk did not give more details about the performance of this series of products.
When used as a device's built-in memory card, Extreme MicroSD has a very eye-catching performance. Most of these devices are exclusive to the read-write process, starting with 32KB blocks, it can reach or even exceed the nominal speed: read 170MB/s, write 100MB/s. Sometimes Xiaobian even wonders if it is used with the UltraME PRO MicroSD brush low product grade.
The queue depth is 2
The queue depth is 4
The queue depth is 6
The queue depth is 8
When used as a storage expansion device for products such as the Surface, extreme MicroSD continues to perform well. For such storage products, the read and write queue depth is usually low, and the memory card peaks at the 2nd and 4th equivalents; it can still maintain the best write speed state with only a slight decrease in the read speed when the queue depth is further increased.
This performance performance, which is suitable for multi-stream sink reads and writes, even makes the Extreme MicroSD comparable to the purple card (surveillance memory card).
It can be said that with a 3-fold increase in capacity (256GB to 1TB), a near doubling of speeds, and an increase in multi-stream write capabilities, extreme MicroSD (SanDisk Extreme Extreme Mobile) memory cards have more product application areas, and all have excellent performance performance, which is a generalist to meet the needs of consumers for mobile storage expansion. Coupled with the moderate price of the product, it is well worth replacing existing small-capacity, low-performance memory cards with consumers.