How To Choose And Test SD Card?

When it comes to SD card products, everyone can say that they are both familiar and unfamiliar. Speaking of familiarity, most of my friends have used it more or less, such as cameras, driving recorders or GoPro, mobile phone storage expansion and other applications. But it is also because many friends only look at the capacity and price of the SD card at most, and they don’t know much about various interface standards, speed certification, and even the specifications of the SD card. Today we will learn about the origin of SD card and how to buy it.

The early data writing speed gear is up to 10, which is the so-called "Class 10", which is already the current mainstream level. At present, the UHS interface standard is generally used to locate the grade and speed of the SD card, and the mainstream is in the process of advancing from the UHS I standard to the UHS 2 standard. The UHS writing speed has level 1 and level 3, and level 3 is faster. Finally, there is a symbol of V+ number, which is generally V30, and V60, which is the standard for expressing video writing speed.

The specific speed difference can be seen in the table below. Generally speaking, the writing speed of 30MB/s can already shoot 4K video, but if you want to ensure the video quality as much as possible, it is recommended to use V60 or V90 standard SD card.

How to see the UHS II interface?

Finally, the latest UHS II standard interface can also be seen at a glance from the appearance, because a row of interfaces has been added to the first-generation product.

Of course, in addition to the SD card itself, the device also needs to support this interface. However, considering that even if you change the camera, SD can still be used.

Now SD cards and TF cards are widely used, and are widely used in security cameras, drones, vehicle driving recorders, mobile phones, 3D printers, video cameras, cameras and other equipment. SD card is the English abbreviation of SecureDigitalCard. The literal translation is "Secure Digital Card". The official abbreviation is SD. It is a proprietary non-volatile memory card format developed by the SD Association for portable devices. Due to its small size, fast data transmission speed, hot-swappable and other excellent features, it is widely used in portable devices. At present, there are many grades and classifications of SD cards and TF cards, and various brand products are dazzling, and the quality is uneven. How should we measure the speed of the purchased SD cards and TF cards?

Step 1: Decide on Capacity

Once upon a time, SD cards were still in the era of hundreds of megabytes, and a 2G SD card felt huge. However, with the development of the times, more and more cameras have a capacity of tens of megabytes for a photo in Raw format, and SD cards are getting bigger and bigger.

Generally speaking, the current mainstream SD card is at the level of 64G/128G, and the price of the lower 32G is often much more expensive than 64G (because the main control cost of the SD card is unchanged); 256G/512G, the cost of storage particles is much higher; so in comparison, it seems that the cost performance is much weaker.

Therefore, I recommend everyone to start with a 64G card if you have a budget, and buy a 128G card if you have a sufficient budget.

Step Two: Speed

As mentioned earlier, there are various speed standards for SD cards at present, but they remain the same. The most important thing is the read and write speed of the SD card itself.

High-speed reading and writing will definitely bring us a better experience in daily use, but on the other hand, it also requires better master control and more advanced storage particles, and the price will rise with the tide. Therefore, many friends will ask "How fast is fast enough?" The answer is: "It depends on your needs and budget!"

Do you suspect that you have bought a fake SD card, a fake memory card, or a fake U disk?

MyDiskTest is an expansion card detection tool specially used to detect whether the U disk, SD card, CF card, and memory card have been expanded.

It integrates several major applications: expansion detection, bad block scanning, speed test, bad block shielding, etc. . Of course, its biggest bright spot is that it can quickly detect whether the storage product has been expanded or not. It is an essential tool for you to screen U disk, SD card, CF card and memory card.

In addition, it can also detect whether there are bad blocks in the FLASH flash memory, whether black chips are used, and the original data on the disk will not be destroyed. And it can test the reading and writing speed of U disk, and carry out aging test on storage products.

Features:

1. Check whether the memory card has been expanded.

2. It can detect whether there is a bad block in the FLASH flash memory or whether it is a black chip.

3. It can shield bad blocks without destroying the original data on the disk.

4. Can test the reading and writing speed of U disk.

5. Carry out aging test on storage products.

Summarize

Now that we’ve talked, let’s review some major trends and key points in the current SD card market:

The current mainstream SD card capacity is 128G

· Read and write speeds are key to SD card performance

· The writing speed above 30MB/s can theoretically shoot 4K video, 90MB/s is suitable for most scenes, and the extreme speed of 300MB/s is suitable for professional photographers, especially sports photographers in high-speed continuous shooting occasions.

· The faster the reading speed, the higher the efficiency of copying photos. 100MB/s is just starting, and 200MB/s is not too fast.

· It is not that the more expensive the price, the faster the speed, the key is to look at the specific speed of the card and the various certifications it has passed

For the driving recorder and outdoor camera monitoring equipment, you can choose a professional TF card, generally 32G or 64G. It is specially optimized for the relatively harsh environment in the car (high temperature in summer), and it is still worth investing in.