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I've been in this situation and it's the card reader that is broken.
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You guess the registration form has been changed, look for the relevant information online.
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You can look for it in the properties.
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The mobile phone memory card is write protected, which means that the mobile phone memory card has become read-only, which is a relatively common fault. Here's why:
1. I bought a fake card, which has a short life and quality failure.
2. The card is real, but the quality is not good. For example, it is a card of a small cottage factory.
3. There is a compatibility problem between the mobile phone and the card. This is often seen. Electronic products often have some compatibility issues. This can be solved by trying to reframe the card reader.
4. The mobile phone is overheated for a long time, and the memory card is frequently read and written, resulting in damage to the memory card. Like when traveling, the camera is used very frequently, if a large number of photos, and the photo is set on the card, the weather is hot in summer, the frequency of the mobile phone is high, it is easy to burn the card. Like Samsung's note3, it was once reported by netizens that the card is often burned, which is caused by factors such as high frequency and poor card quality.
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The first case is that the memory card does have write protection, which is different from the RS-memory card, which has a write protection switch. The solution is that if there is write protection, it is recommended that you check the memory card itself Generally, there will be a small switch on the memory card, just turn it on and dial it to the other end.
The second situation is that the memory card does not have a write protection switch, which is the normal kind of card Write protection is a very abnormal phenomenon It is not what those people say in the mobile phone to add a password to the card or something Obviously, you add a password to open the card on the computer and the input decoding window will appear This is actually because the size of the card reader and the memory card itself can not be completely contacted The working principle of the protection of the memory card is actually to control the contact area of the metal contact point, if it is not possible to ensure that all the metal pieces are pressed, The default is that the write protection switch is turned on, which is also the practice of the write protection switch on the RS-memory card The solution is actually to find a piece of hard paper and insert it into the card reader along with the front of the memory card to ensure that the metal piece is completely in contact You can also press it into the card reader by hand
The third situation is that the memory card is plugged and unplugged for a long time, resulting in the metal contact piece, oxidation or wear phenomenon, in this case, use the solution to deal with the memory module, find an eraser, wipe back and forth on the metal sheet several times, generally no major damage can be solved.
The fourth situation is the problem of the memory card itself, in this case, you have to go to the memory card repair software tool to fix it according to the requirements, the memory card repair software sdformatter, you can go online and offline, and the memory card can be solved by yourself. If the memory card repair tool can't solve the problem, then your card should be broken and you need to get a new one.
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Insert the memory card into the computer, right-click, there is a property at the bottom, after the property is opened, there is a dialog box inside, and there is a read-only check at the bottom, and then you can remove the check. The protection of nature is lifted....
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There's a little switch-like thing on the card (or the card reader) on it, you adjust it to: unlock, and that's it!
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