How to Remove Write Protection from SD Card (and Fix "Can't Format SD Card")

Fix 1: Unlock the physical lock switch

1. Remove the card and look at the left edge (card label facing up, contacts down). Find the small slider.
2. Slide it up toward the contacts into the unlocked position. Down toward the label end locks it.
3. Reinsert it and try saving a file.

MicroSD cards have no switch, but the SD adapter does. A switch that is loose, broken or stuck halfway can fool the reader, so slide it firmly several times. If it still reports locked, try another adapter. Some people tape over the switch notch on a broken adapter, but a replacement adapter is cheap and more reliable.

Fix 2: Rule out the reader, port and cable

• Try another USB port, preferably directly on the PC, not a hub.
• Try a different card reader or the laptop's built-in slot.
• Test the card in a second computer or in the camera.
• Blow dust from the card contacts and wipe them with a dry lint-free cloth.

If the card works as writable elsewhere, the original reader or its driver is the problem. If it is read-only everywhere, continue.

Fix 3: Clear the read-only attribute with Diskpart (CMD)

1. Press Win+X and choose Terminal (Admin) or Command Prompt (Admin).
2. Run the commands below. Replace 2 with the number of your SD card, matching its size.

diskpart
list disk
select disk 2
attributes disk
attributes disk clear readonly
attributes volume clear readonly
exit

Success looks like "Disk attributes cleared successfully." The first attributes disk line shows Current Read-only State so you can confirm before and after.

Diskpart cannot remove a hardware, firmware or policy lock. If the attribute returns after you reinsert the card, go on to the other fixes.

Fix 4: Check the WriteProtect registry value

1. Press Win+R, type regedit, press Enter.
2. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies.
3. Set WriteProtect to 0. If the key does not exist, the registry is not the cause.
4. Restart and reinsert the card.

Or run this in an admin Command Prompt after backing up the registry:

reg add "HKLM\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies" /v WriteProtect /t REG_DWORD /d 0 /f

Fix 5: Remove a Group Policy or removable storage block

On Windows Pro, Enterprise and Education, press Win+R, run gpedit.msc and go to Computer Configuration → Administrative Templates → System → Removable Storage Access. Set Removable Disks: Deny write access to Not Configured or Disabled.

On Windows Home, check HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices for a Deny_Write value of 1. On a managed PC, only your administrator can lift the rule, and it can return at the next policy refresh.

Fix 6: Unlock a BitLocker-encrypted card

A card encrypted with BitLocker To Go shows a padlock. Open it in File Explorer, enter the password or recovery key, or check status:

manage-bde -status E:
manage-bde -unlock E: -Password

Without the password or recovery key, the data cannot be read. Find the key in your Microsoft account or printed backup.

Fix 7: Scan and repair file system errors

1. Open This PC, right-click the card → Properties → Tools → Check.
2. Or use an admin Command Prompt (replace E: with your drive):

chkdsk E: /f /r

The /r option scans for bad sectors and can take a long time on large cards. Many bad sectors suggest the card is wearing out.

Fix 8: Scan for malware and unhide files

1. Run Windows Security → Virus & threat protection → Scan options → Full scan with the card inserted.
2. If folders became shortcuts, restore them (replace E:):

attrib -h -r -s /s /d E:\*.*

Fix 9: Format the card after protection is removed

Copy your files off first. Then use one of these:

• Disk Management: right-click Start → Disk Management → right-click the card's partition → Format. If it is unallocated, choose New Simple Volume.
• SD Memory Card Formatter from the SD Association: the best option for cameras, and it can format cards over 32 GB as FAT32 or exFAT.
• Diskpart full rebuild (erases everything):

diskpart
list disk
select disk 2
clean
create partition primary
format fs=exfat quick
assign
exit