How to fix "the disk is write protected" error on usb drives?

This article is going lớn talk about "The disk is write-protected" error on USB flash drive và SD thẻ. It explains possible causes và solutions to lớn remove sầu write protection for USB drive & retrieve data when this error occurs. If you are troubled by this issue for the moment, you can read this guide before giving up the disk.

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What is "write protection" on USB disks?Causes of USB write-protected errorHow lớn add write protect to lớn a flash drive?How lớn remove sầu write protection from read-only USB drive?Solution 1: Chechồng the drive for a physical lockSolution 2: Disable write protection in RegistrySolution 3: Use Command Prompt to remove write protectionSolution 4: Chechồng trương mục permissionSolution 5: Make sure the USB drive isn"t fullSolution 6: Ensure your USB drive sầu is free from virusSolution 7: Format the disk write-protected diskSolution 8: Verify bad sectorsHow lớn recover data from write-protected flash drive?Free flash drive sầu data recovery softwareSteps to lớn recover data from write-protected flash drive

What is "write protection" on USB disks?

Write protection on USB flash drives or SD cards is a handy function aiming to prevent accidental tệp tin deletion và bloông chồng suspicious files like vi khuẩn và un-authorized sources. External data storage devices are very common devices and they are widely used these days, as they are portable & users can take them anywhere they want. When a USB disk is write-protected, it turns inlớn read-only. In that case, any action to add or edit data into lớn that disk will be denied. All attempts related lớn writing action will be prevented, such as add or create new tệp tin, edit existing data, delete files that already present, formatting current USB disk, etc. Another reason people only give readable access lớn their storage device is lớn prevent others from sharing content stored on the disk.

When you try to lớn write data khổng lồ such disk you"ll get error message "The disk is write-protected. Remove sầu the write-protection or use another disk." as shown in the picture below.


However, this feature may become a headache if it is not properly used or USB drive sầu is corrupted. In that case, the error "The disk is write protected" will drive you crazy, as you can"t access data on that USB drive sầu và the only option khổng lồ fix it might be format write-protected USB complete, which won"t be an easy job. What"s worse, if files on that drive sầu are important to you, formatting won"t be a wise choice, for formatting wipes data. Thus you need to lớn disable or remove sầu write-protection from USB disk first. Let"s look at a real case found from a forum:

"I recently bought a new laptop that installs Windows 10. I have sầu four USB flash drives và one of them is now marked "write-protected" for no reason, as I didn"t do anything khổng lồ it. I found a solution for windows XPhường & tried on my own computer. But it didn"t remove write protection. I just want to copy files from the USB disk to computer & then reformat it. Can you help me on the write protection removal thing on Windows 10 computer or retrieve data?"

Causes of USB write protected error

This error may appear for several reasons and this section lists the most common ones.

Read only switch

Many memory cards & USB flash drives have sầu a small physical switch on the side edge. The switch is used to lớn mix write protect & makes the drive sầu read only.

The flash drive sầu is full

If the flash drive is full of files và does not have sầu free space and it is likely khổng lồ be write-protected. You can right-clichồng on the disk and choose Properties lớn check how much miễn phí space available on the drive.

Security settings

Some computer uses or administrator of the machine phối security setting on computer lớn prevent actions khổng lồ write data khổng lồ a USB disk. You need to lớn remove sầu such settings by modifying settings in registry.

The Read-only property

If you mix files or folders on existing on the drive sầu to lớn "Read Only", you"ll receive this error message when copying, editing or replacing files. In that case, you need lớn navigate khổng lồ tệp tin Properties to check whether the "Read-only" option is selected.

Virus attack

Virus can infects everywhere data exists và cause various issues such as data damage, tệp tin loss, system crash, storage device failure, etc.

Drive is broken or has bad sectors

If causes mentioned above sầu can"t tài khoản for your case, it is likely your removable disk is broken or gets bad sectors. The disk might be old và just reaches its natural lifespan, as many disks have limitations on the amount of reading and writing data. Besides, normal read or write actions can"t be done to bad sectors, thus you may need to seek help from disk verifying tools.

How lớn add write protect khổng lồ a flash drive?

If you have sầu stored some important data on your flash drive sầu, then it"s a good choice to lớn enable the write protection before inserting it khổng lồ computers which is not well protected by an-virut software. There are chances that flash drive infects virut when connecting lớn public computers. Although write protecting on USB drive is not the foolproof action to lớn prsự kiện people from editing or deleting your data if they know how khổng lồ disable this feature, it is better than keeping flash drive in open mode. Here is a handy tutorial lớn add write protect.

Method 1:

Examine the flash drive sầu or memory card and find out the switch. You can move sầu the switch to the lock location to enable the write protection for the device.

Method 2:

Set drive sầu security permissions

Step 1Right-cliông chồng the drive letter associating with the flash drive sầu in Windows Explorer và select "Properties" from context thực đơn.

Step 2Clichồng Security tab on the Properties Window, select "Everyone" under Group or user names & cliông chồng "Edit" button.

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Step 3On the "Permissions for Removable Disk" Window you can see a section named "Permissions for Everyone" và two columns of check boxes. Cheông chồng those under "Deny" for items lượt thích Full Control, Modify and Write.

Step 4Cliông chồng Apply & then Ok button.

How lớn remove sầu write protection from read-only USB drive?

Solution 1: Chechồng the drive sầu for a physical lock

Many USB drive sầu & SD cards have a physical loông chồng switch which can turn on & turn off write protection. Thus you need to examine whether the flash drive sầu enables this loông chồng. Check the left or right edge to lớn find out the switch. If the switch is in the Loông chồng side, just move sầu it lớn the unlocked position. If this method can"t solve the write protection error, please try following solutions.


Solution 2: Disable write protection in Registry

Editing registry is another way to lớn fix "The disk is write protected" error. Write protection can be enabled in Windows registry & it is not easy lớn write on USB devices. If you disable this feature via registry editor you can regain read and write privileges on removable drives. Here are the steps you can follow.

Step 1mở cửa Registry Editor. Click Start button & enter "Regedit" in searching box and press enter key. If you see prompt given by user account control, click Yes. Alternatively, you can get Registry Editor by typing Regedit.exe in Run commvà which can be opened by pressing Windows & R keys.

Step 2In the left part of Registry Editor, navigate to:


Find out StorageDevicePolicies & open it. If it does not exist, you can create one. Right click on Control và choose "New" & "Key" & name it as StorageDevicePolicies.


Step 3Cliông xã StorageDevicePolicies key in the left và right-cliông chồng the empty area on the right side. Select New & DWORD (32-bit) Value. Then change its name to WriteProtect.


Step 4Double clichồng the WriteProtect key and enter 0 in the Value data box & click OK. Cthua Registry Editor and re-plug your USB drive.


Solution 3: Use Command Prompt khổng lồ remove sầu write protection

Read and write attributes of UBS disk can be modified from Windows Comm& Prompt with the help of a simple commvà line. You can follow steps here lớn clear write attribute for flash drive or SD card.

Step 1xuất hiện Command Prompt.

Cliông chồng Start button và enter cmd in searching box. Then right cliông xã "cmd.exe" from the searching danh mục and choose "Run as administrator". Click Yes, if you get UAC prompt.

Step 2Type in diskpart & hit Enter.

Diskpart comm& is a Windows built-in tool for disk partitioning và it is able khổng lồ change values related to USB drives. If you got the error "The request could not be performed because of an I/O device error. See the System Event log for more information", the storage device might be physically damaged.

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Step 3Type the following commands one by one và press Enter key after each command.