How to untie the U disk when it is set to protect.

How to remove the write protection of the USB flash drive?

One-click to remove the write protection of the U disk, how to remove the write protection of the U disk, a look will be!

Some USB flash drives themselves have a write protection switch, generally on the side of the USB flash drive, there is a sign with the word "lock". You just need to press this switch again to remove the write protection of the USB flash drive.

, not because the flash memory card is written to be closed on/off, nor is it written protected by software, nor is it damaged by the flash memory card or black chip expansion and other reasons, because the flash memory card can be used normally with a card reader.

Solution: Because the flash memory card can be used normally if it is replaced by a card reader, it can be confirmed that the card reader is faulty, and a solution should be sought from this aspect.

Disassemble the card reader's casing to reveal a metal shield that wraps the reader's slot. On the side of the shroud's write-protection switch against the flash card, a small strip is cut that forms an electrode. In addition, on the inside of the small metal strip, the card reader also makes a metal reed, which becomes another electrode that can be connected to the small metal strip of the shroud.

Because this reed electrode is a figure-eight shape with a lower width and a narrow upper part, under normal circumstances, when the write protection switch of the flash memory card is unlocked, the reed electrode is squeezed by the flash card write protection switch in the upper position in the direction of the small metal strip of the shield, so that it is turned on, and the whole circuit is in the state of write protection unlocking (conduction is unlocking), and the flash memory card can be written normally; When the write-protection switch of the flash memory card is locked, the write-protection switch is dialed down to the width of the reed electrode, and the reed electrode will not be squeezed in the direction of the small metal strip of the shield to make it on, and the whole circuit will be in the write-protected latching state (disconnected and locked), and the flash memory card will be write-protected.

However, when there are some abnormal conditions, such as the small metal strip of the shield after the card reader is dropped, it is deformed by vibration and warped, or the elastic fatigue of the reed electrodes, or the metal surface will not be able to conduct due to poor contact between the two electrodes due to oxidation or oil stains, then the flash memory card will be banned forever regardless of whether the write protection of the flash memory card is unlocked or not.

To solve this problem, if the small metal strip of the shield is warped by vibration deformation or the elastic fatigue of the reed electrode, it is very simple, just find a toothpick stick, press the small metal strip of the shield slightly inward, so that it can contact the reed electrode; If the metal surface is caused by poor contact due to oxidation or oil stains, try to remove the oxide or oil stains.

If you really think it's troublesome to fix, then change to a card reader, and the original flash card in it is still used.

1。Is your memory card a large card (no card tow alone) or a small card (card tow is required to be used in a card reader)?

2。First of all, make sure that it is really write-protected: right-click on the portable hard disk, Properties, and see if there are three items in your file properties (read-only) (hidden) (archive) Check mark ( ) is typed on Read-only (e.g.

Read-only) If this is the case, the proof is indeed write-protected, because normally all three are not marked According to these my analysis guidelines are as follows.

First, you first look at the card reader on the card tow on the lock closed (there is a lock word), you just need to dial the other end to cancel the write protection on it, second, it is possible that your memory card and the card drag contact effect is not good, you put the card when a layer of paper to try, I will pad the paper myself, very practical.

Third, if there are conditions, connect the computer with a data cable, generally this phenomenon is not feasible to format with a computer, you can only use the formatting that comes with the mobile phone to format, but before the protection is removed, it is best not to format, because you still can't add things after the grid, but the original files are gone...

The above is my policy on how to deal with the write-protected memory of mobile phones, and the parties can analyze and deal with it according to similar situations!! I wish you all to solve your troubles as soon as possible.

Other methods: You can first take a look at what kind of disk your USB flash drive is, for example, if it is a G disk, find a way to enter DOS directly without entering Windows at startup and then enter.

format g: That's it.

How to remove the write protection of the USB flash drive?

Write protection reason.

1. Virus, the probability is small.

2. Whether the U disk supports write protection, and if so, whether it can be removed with mass production tools (if it is not the write protection added by itself, it is basically a bad sector).

3. The track is damaged, and the track can be shielded for recovery with mass production tools.

1. The main components (memory) of the U disk have been damaged, or some internal unit blocks are damaged, similar to this situation, it is recommended to find Taipower after-sales personnel first, and inform you of the status of the U disk, if you are lucky, the manufacturer's technical answering personnel will help you rewrite the program remotely, so that you can learn a hand, and secondly, you can also avoid some new problems that lead to after-sales disputes when you are not familiar with the use of software.

2. After the repair of the U disk is completed, it is best to copy the files corresponding to the space size of the U disk, and try several times to verify the quality of the hardware of the U disk itself, and also make the storage files in the future have a basic guarantee. Poor friends.

Hope the appeal helps you!

There is a small bump on the side of the USB flash drive, and the board is fine.