How to prevent problems such as buying a fake SD card?

The digital store on the right hand side of the new area on the first floor of Taihe Electronic City.

Detect the real capacity of the real and fake USB flash drive and mobile phone memory card.

It's also because I'm worried that I'll buy a fake, so I found such a gadget on the Internet - "mydisktest", which is specially used to test the real capacity of U disk or mobile phone memory card, mydisktest is a U disk SD card CF card and other mobile storage product expansion identification tools, it can easily detect whether the storage product has been expanded capacity, shoddy.

It can also detect whether the flash flash memory has bad blocks, whether it uses black chips, does not destroy the original data of the disk, and can test the read and write speed of the U disk. It is a must-have tool for you to choose USB flash drives and memory cards.

In fact, a long time ago,I bought an 8G capacity U disk on the stall.,But because I was young at the time.,I don't know if this thing is fake.,That is, I didn't think much about it when I simply checked the attribute on the computer8G.,But after a while,I found that the files inside would become garbled.,Or all of them will become exe format.,And then I knew when I looked at the information on the Internet.,It turns out that many people have had this situation.。

The reason is because the U disk itself is not so large, and the things you store in it are garbled and can't be opened.,Later, it was found that it was a flash flash card transformation of more than 500MB with a tool.。 Later, I went to the computer city to teach me to use such a small tool to detect the actual capacity of the mobile disk, and I knew the great use of this thing when I bought a USB flash drive mobile phone memory card.

When buying an SD card, you must be careful of this kind of fake card.

When buying an SD card, you must be careful of this kind of fake card.

In order to identify authenticity, you must first understand the main forms of counterfeiting of SD cards. In the final analysis, there are no more than two types of SD card counterfeiting - replacing the old with the new and the shoddy with the shoddy. The author has made a summary of its specific performance:

Capacity fraud: Selling low-capacity cards instead of high-capacity cards. - This kind of fake is so obvious that the counterfeiters disdain it, and now it is basically difficult to come across. You deserve to be deceived if you can't see it.

Counterfeiting of old and new: Repackage old SD cards on the market and sell them as new cards to earn the difference. ——It's easy to see the clues from the old and new gold fingers on the stuck body, and it's rare now.

Speed fraud: Use a low-speed card with the same capacity to change the label packaging and sell it as a high-speed card, and there is no difference in appearance, and it can only be verified by speed measurement. This is currently the most common form of counterfeiting in the fake SD market.

As long as you are careful when buying, it is easy to see through the counterfeiting of capacity and new and old, and it is basically difficult to be deceived. It is difficult to prevent the speed of counterfeit products, which are difficult to see from the packaging to the appearance, which is what we need to focus on when buying an SD card.

Using a 360U disk to identify, I tried it, and I can see how much memory can only be stored in reality, and if it exceeds the file, it will be lost.

It's true, the kind of small factory that won't get a laser code machine.

If there is a problem with the SD card, the following situations will generally occur:

1.The SD card is not recognized. When the SD card (via a card reader or a device with an SD card installed) is connected to a computer or digital camera, the computer still looks like a card reader or external device without an SD card attached;

2.It can identify the SD card, but it is not possible to confirm the storage capacity of the SD card. In some cases, the computer recognizes that an external storage device is connected to the computer, but the storage capacity displayed is 0 bytes.

3.Unable to store data to SD card. In some cases, the computer or the device on which the SD card is installed shows that a memory card (SD card) is installed, but the computer or the device on which the SD card is installed displays the text "Unable to write data" or "The memory card is corrupted" when the SD card is always stored on the SD card.

4.It is possible to store data to the SD card, but the files cannot be found after storage. Copy or store files to the SD card, the operation does not have any error prompts, but check the SD card after storing the data, the capacity of the SD card is still available at full capacity; Then open the SD card to find the files, and find that there are no files on the SD card.

5.Data can be stored on the SD card, but the stored data cannot be read. You can copy or store files to the SD card, view them after storing the files, and you can also see the file name and some storage space of the SD card being used.

However, when you want to read a file or copy it to another storage device, you get a message saying "The file cannot be read" or "The file is corrupted".

6.Sometimes the SD card is sometimes recognized on the same device, sometimes it is not.

7.There are also cases where an SD card works normally on some devices or connected to a computer, but it cannot read and write normally when it is changed to another device.

There are 3 rows of laser lettering on the back of the miniSD card, the top row is the capacity indication that the capacity is not the same, and the words 1024 can be seen, the middle row is the factory code, and the bottom is the place of origin. The smallest SanDisk I sell now is made in Madeintaiwan.

2. Fake cards are not so fully marked, but they must be prevented from being covered by unscrupulous merchants, and they must be uncovered, if not, they must be fake cards, which is the easiest way to distinguish between real and fake cards.

3Mini card and TF card are the same silk screen printing, the label of the fake and the original card font pattern is a little different, this is a little difficult for people who have not bought it.

4 Because the fake one has been sanded (the mark on the surface is removed), the original sanding feel is gone, but the surface is very smooth.

The trademark words are not neat, due to the limited refurbishment of some refurbished technologies, the size of the word type is somewhat different from the original.

There is a grinding on the metal sheet.

(though js will interpret it as something left when someone tried the card before).