Shulou(Shulou.com)06/02 Report--

Nowadays, traffic recorders, network surveillance cameras, digital cameras, UAV aircraft and other equipment are very popular, most of these devices need MicroSD memory cards as storage space. At this point, we need to select the most matching memory card according to the definition of the video that the device can shoot.

Acer said before that memory cards used to include Secure Digital Memory Card (SD), MicroSD Card (also known as TF), Compact Flash (CF), Memory Stick (MS) and other forms, but now only SD and MicroSD are still popular. Among them, with the continuous improvement of SD card capacity, these two forms of memory cards have further derived SDHC (SD High Capacity), SDXC (SD eXtended Capacity) and SDUC (SD Ultra Capacity) standards.

With the miniaturization of various digital devices, MicroSD cards have a tendency to unify the world, while SD cards are used in professional fields such as ultra-high-definition cameras with greater capacity and speed advantages. Is the memory card the bigger the better? Hongwang Semiconductor suggests that if you are used to shooting with a digital camera, choosing a memory card is not the bigger the better.

From the point of view of the ratio of capacity to price, in the face of the increase in the price of flash memory cards, it must be more cost-effective to buy memory cards with larger capacity. However, for most of us, we don't click and record videos all the time, and not many people need to take pictures in RAW+JPEG form for post-processing, so it doesn't take up that much memory card space.

In short, if you buy a 128GB memory card, the space you often use is less than 20GB, which will result in a waste of space close to 100GB, which in fact costs more. So, if you don't have that much data for travel photos, it's recommended to buy 32GB capacity.

With the rise of the demand for 4K video recording, memory cards need higher rates to meet the needs of feverish users. Therefore, the SD Association has introduced UHS-II and UHS-III bus interfaces into SD4.0 and SD6.0 specifications successively. The biggest difference between them and UHS-I is that they enable a row of additional pins, and the traditional pins above are compatible with DS, HS and UHS-I buses. The new pins below are used to identify the new FD156 and HD312 working modes of UHS-II.

At the standard 4K resolution, the total number of pixels in the image can reach 8 million. If the shooting picture is very complex, each frame takes up more space. In addition to video, when taking photos, a scene often needs to freeze multiple, coupled with the need for post-processing, a photo will take up more space, it is best to prepare a large-capacity memory card.

For storage media such as memory cards, it is recommended that we buy reliable brands and do not choose cheap three-no products, which is conducive to ensuring quality. As a senior domestic storage brand, Hongwang Semiconductor's TF/ SD card is specially designed for mobile devices and smartphones, drones, tablets, traffic recorders and surveillance cameras, with a speed class of Class 10, and can easily handle 4K, 8K, 3D video recording and 360-degree high-definition applications. High-speed performance greatly accelerates your workflow and saves work time; it has the function of automatic error correction ECC, and has passed the stringent tests of waterproof, shockproof, X-ray, anti-static and resistance to high temperature and extreme cold, which can still be used in extreme and harsh environments.

In addition, with the continuous decline in the price of MicroSD memory cards, products with similar prices seem to have the same certification logo on the surface, but the actual performance may be very different. Therefore, this requires us to find the data corresponding to their actual read and write speed from the promotional materials, compare it with other products, and select the one with better performance.

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