How to judge what kind of flash memory is used in a mobile phone?

How to distinguish the authenticity of a memory card can't just look at it. With the help of some software! For example, MyDiskTest can detect whether this card is real or not! The following is the difference between the real card and the fake card I found. I hope the landlord can read it patiently! Now let me briefly introduce what a TF card is. TF card, also known as T-Flash card, full name: TransFLash, also known as Micro SD, was jointly developed by Motorola and Sandisk * * * and launched in 2004. It is an ultra-small card (11*15 *1mm), which is about 1/4 of the SD card, so it can be regarded as the smallest memory card at present. TF is a small card, SD is a big card, and they are all flash cards. TF card has the smallest volume and can be used as SD card after SD card conversion. Adapters can be used on devices that use SD as storage media. TransFlash is mainly developed for camera phones, which are used to shoot large images and download large video clips. TransFlash card can be used to store personal data, such as digital photos, MP3 players, games, mobile phone applications and personal data. , and also built-in copyright protection management system to protect downloaded music, videos and games. In the future, the new TransFlash will also be equipped with encryption function to protect personal data, financial records and medical care documents. The compact TransFlash allows the manufacturer to adopt this design without worrying about the size of the mobile phone. Another flexible application is that the supplier can replace it according to the different needs of customers at any time before delivery, which is an advantage that embedded flash memory does not have. At present, TF cards sold in the market include Shengchuang, Kingston, Yu Zhan, Sandisk, Weigang, PNY, Shancun, Lenovo, Chuangjian, Lei Kesha, Dannai Electronics, Jintek and other brands. But most people choose Kingston Card, because the warranty of Kingston Card is lifetime, and the brand is bigger than other brands. But what brand of TF card to buy depends on the landlord's own choice. Please be careful when buying TF cards. Now everything is fake, including TF card. So I also uploaded a tutorial to check the authenticity of TF card. In order to avoid trouble, I hope the landlord will bring a laptop or netbook to buy a TF card! Cut the crap, please read the following TF card identification method carefully. At present, many profiteers in the market sell mobile storage devices such as USB flash drives to consumers after expansion, which is black-hearted and bad behavior. Have you been cheated? MyDiskTest is an expansion identification tool for mobile storage products such as U disk, SD card and CF card, which can easily detect whether the storage products are expanded or shoddy. You can also test whether there are bad blocks in the flash memory and whether black chips are used without destroying the original data of the disk. You can also test the reading and writing speed of the U disk, which is an essential tool for you to choose the U disk and the memory card. Since this paper introduces the identification of authenticity of memory cards, it is very necessary to know some basic knowledge of TF cards. The TF card we use, also called "microSD" to put it bluntly, is to remind us not to buy the wrong new engine oil. Please look at the picture below. What is the SDHC standard? SDHC is the abbreviation of "high capacity SD memory card", that is, "high capacity SD memory card". In May, 2006, SD Association released the latest version of SD 2.cn/detail/37/364528.shtml#down.. This software is best used under XP system, and WIN7 system will prompt "You are using Windows 7 operating system, and some functions of this software will not be available". Click OK, and the test results will not be affected. Caution: Please back up the files in the U disk /SD card before the test to prevent data loss. To open this software, first of all, let's check whether this USB flash drive or card reader is extended. Select Bad Block Detection. If the following picture appears, I regret to tell you that your USB flash drive or TF card has been expanded! If the test chart is as follows, congratulations on not buying an expansion disk! Let's test the transmission speed of this USB flash drive or memory card to determine whether it is a C2 card or a C4 card. In addition to the configuration of the computer and the quality of the card reader, the transmission speed of the card reader is much faster than that of the data cable. It is recommended to use the card reader to transmit data. There is a simple reason. Such a long data cable will definitely affect the speed, and the card reader is directly connected to the computer. If your computer and card reader are not too bad, the test results will not be much different. The following test results are my TF card test results. Reminder again: Please back up all the files in your TF card and teach you how to read the test results in the figure: R: For reading speed w: For writing speed, copying files to the computer is called "reading" and copying files on the TF card to the computer is called "writing". When we transfer files to a TF card, there are often multiple folders, and one folder contains multiple small files (refer to the 32M file copy test for the copy speed of large-capacity movies), so we take "4.0 file copy test" as a sign to distinguish C0, C2 and C4. As mentioned above, the minimum transmission speed of C2 is 2M/ s and C4 is 4m/ s. From the above figure, we think that this TF card is C0 card. What is depressing is that my card still has C4 logo, and my grandmother's was cheated by profiteers! Just now, I spent 40 minutes copying 3. 12G files into TF card, so I suggest you buy at least C2 card. I hope friends who read this article can buy real C4 cards or C2 cards!