Why is the sd card not there even though it is plugged in?

Causes: 1. The SD card interface is dirty, resulting in poor contact between the SD card and the card slot, resulting in the SD card being unable to be read; 2. The SD card slot of the mobile phone is squeezed against the battery; 3. Frequent direct pull-out Insert the SD card, causing the metal of the card slot to become rusty or distorted, making it impossible to read the SD card; 4. The SD card is poisoned, and the files or software inside are infected with viruses; 5. The SD card is broken and cannot work properly; 6. The phone itself Something went wrong.

The operating environment of this tutorial: HarmonyOS 2 system, HONOR V30 mobile phone.

SD card is a new generation of memory device based on semiconductor flash memory. Due to its small size, fast data transmission speed, hot-swappable and other excellent features, it is widely used in portable devices. , such as digital cameras, tablet computers, and multimedia players.

#The sd card is obviously inserted but does not exist because the sd card is not recognized. The following article will tell you the reasons why the SD card does not exist.

The reason why the SD card is clearly inserted but not there

1. The SD card interface is dirty

Some netizens do not pay attention to the maintenance of the memory card when using mobile phone memory cards, causing the metal area of ​​the SD card to become contaminated with dust and dirt. This will cause poor contact between the SD card and the card slot, resulting in the SD card being unable to be read. The solution is very simple. Use an eraser to rub the metal part of the SD card and try again to see if it can be read.

2. The SD card slot of the mobile phone is squeezed by the battery

In order to cater to the public, major mobile phone manufacturers now pursue ultra-thin models and design card The slots are getting more and more clever. If you are using a non-original mobile phone battery, due to inconsistencies in thickness and height, the battery may squeeze the card slot, and the SD card may not be read. If this is the case, all you have to do is replace it with an original battery, or buy a new one from the mobile phone manufacturer.

3. The card slot is rusty or twisted

Many mobile phone SD cards now support hot-swapping. Sometimes many people find that the SD card suddenly changes when using it. If it cannot be read, the SD card will be pulled out directly. Such frequent operations will cause the metal of the card slot to rust or become distorted. The solution is to keep the power off when pulling out the SD card. This can also ensure data security and extend the service life of the SD card.

4. The SD card is poisoned

Now not only computers can be poisoned, but mobile phones can also be poisoned, especially mobile phones with Android systems, which are more likely to be poisoned due to some problems in their own systems. It can lead to cell phone poisoning. If the files or software in the SD card are infected with viruses, it will also cause the SD card to become unreadable. The solution is to download a mobile phone anti-virus software to conduct a comprehensive scan and anti-virus on your phone.

5. The SD card is broken

This is the most common problem. To detect whether the SD card is broken, just find a card reader and insert the SD card into it. Connect the card to the computer. If the normal display shows that the SD card can still work, if it cannot be displayed, it may be that the SD card is broken. In this case, you can only replace the memory card.

6. The mobile phone itself is faulty

The probability of this kind of problem is relatively small, but it is not impossible. In this case, you can only send the phone back to the manufacturer for repair. When we encounter a situation where the SD card cannot be used normally, don’t panic too much. Try to check and solve the problem. For example, the SD card interface may be dirty, the SD card may be poisoned, or it may be caused by the phone itself. Specifically, the editor has explained it. Just check it step by step. I believe it will be solved soon. During the use of the mobile phone, it is very good to install an SD card, which can expand the memory of the mobile phone and prevent other malfunctions caused by insufficient memory of the mobile phone.

Extended knowledge: Features of SD memory card

SD memory card (Secure Digital Memory Card) is a semiconductor flash-based A new generation of high-speed storage devices for memory. SD memory card technology is developed from the MMC card (MultiMedia Card) format. Based on the compatibility with SD memory cards, the SDIO (SD Input/Output) card has been developed. This compatibility includes machinery, electronics, electricity, signals and software. , usually SD and SDIO cards are commonly called SD memory cards.

SD card has high memory capacity, fast data transfer rate, great mobility flexibility and good security. It is widely used in portable devices, such as digital cameras, tablet computers and multimedia players. Devices etc.

The structure of the SD card can ensure the security of digital file transmission and is easy to reformat, so it has a wide range of applications. Multimedia files such as music and movies can be easily saved to the SD card. There are many brands of SD cards on the market currently, such as: SANDISK, Kingmax, Panasonic and Kingston.

As a new type of storage device, SD card has the following characteristics:

• High storage capacity, the most commonly used capacities: 8GB, 16GB, 32GB, 128GB, 256GB wait.

• Built-in encryption technology adapts to the copyright protection function of works based on the SDMI protocol.

• High-speed data transmission; the maximum read and write rate is 100MB/s.

• It is light and small, easy to carry, and has strong impact resistance.

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