How to Solve "SD Card Won’t Format on PC" Issue?

April 30, 2019

Why the SD card won’t format on the computer? What to do? The causes and solutions for SD card won’t format on PC are all right here!

"My SD card won’t format on PC"

I have a Nifty Drive with 120gb MicroSD however it does not seem to be working anymore, because I can’t delete or add files into the SD Card. I have recently formatted the SD card thinking that it will solve the problem however that didn’t work with a pop-out error message: Windows was unable to complete the format. I am not sure if this is just a case of a damaged SD card or is this repairable?” -- a true story from Storage forum.

Possible reasons for the issue

I suffered from a similar kind of situation, but luckily I was able to fix this issue with the help of some simple solutions. Before sharing the effective methods with you guys, let’s first figure out why the SD card won't format on PC. The main reasons include:

  • The SD card gets infected by virus or malware.

  • The SD card is write-protected.

  • Some bad sectors exist on the SD card.

How to fix SD card won’t format in Windows 10/8/7?

So, next is a list of what are supposed to work out best in resolving this issue in Windows 10/8/7. Try them one by one until you can format your SD card successfully.

Way 1. Regularly run the anti-virus software to clean types of virus or malware, so as to ensure the storage media security.

Way 2. Remove the write protection of SD card before formatting

If your SD card is write-protected, then you won’t format it successfully. So first we need to remove its write protection. As for this request, there are two common methods you can have a try.

A. DiskPart utility

(1) Press Win+ R to open Run dialog box, type diskpart and hit Enter.

(2) Type the following commands one by one and hit Enter every time:

list disk: display all of the disks connected to the computer.

select disk n: where n is the number of SD card.

attributes disk clear readonly: change your SD card properties so that it is no longer read-only.

B. Edit the registry

(1) Press Win+ R to open Run dialog box, type regeditand hit Enter.

(2) Expand the entries on the left-hand pane to navigate to the following path:


(3) Right click on the WriteProtect and select "Modify". In the pop-up window, change the value from 1 to 0 and click OK to apply the change.

Registry Remove Write Protection

For more solutions to removing write protection of SD card, you can refer to Remove Write Protection from USB Drive in Windows 10/8/7. Then you can format SD card successfully via traditional methods.

Way 3. Check disk/partition to see whether there are bad sectors

When it comes to checking disk error, most computer will immediately go for CHKDKS or Diskpart which involves with complex command lines. It might be a headache for those who are lack of such knowledge. So today we introduce an easy-to-use freeware: AOMEI Partition Assistant. It allows you to check the disk/partition error and fix them easily, just with a few clicks.

(1) Download and install the freeware. Run it to enter the main interface. Right click the SD card partition. Click Check Partition under Advanced tab.

Advanced Check Partition

(2) Click Check partition and fix errors in this partition by using chkdsk.exe, hit OK and wait until done.

Check Partition And Fix Errors

(3)Then, wait for the checking and fixing process to be accomplished.

Check Partition For Errors Completed

Or, you can right-click the SD card to select Surface Test to check whether there are some bad sectors on the SD card.

Way 4. Force format SD card

If there are not any bad sectors found on the disk, as well as the write protection is removed, but the SD card still won’t format in Windows 10/8/7, you can also turn to AOMEI Partition Assistant, it is a free but powerful sd card format tool. You can use it to force format the SD card.

Warning: Formatting disk will erase everything on the disk, so making a backup is always necessary in order to avoid data loss. AOMEI Backupper (Free) is highly recommended.

(1) Run the software, right-click the SD card partition and select Format Partition.

Format Partitoin

(2) Choose a desired file system, and click OK.


(3) Back to the main interface, click Apply to commit the operation.


During the formatting procedure, you can format the SD card to NTFS, FAT32, Ext2/3/4 and exFAT. Almost every file system you will need is available, making AOMEI Partition Assistant an excellent SD card format tool. All in all, whenever your SD card won’t format on PC using Disk Management, Diskpart or other tools, you can rely on this powerful software. If you upgrade to Professional version, you can unlock more amazing disk partition management functions. For example, you will be able to securely erase data from SSD drives, copy Windows partition to another disk, recover lost/deleted partitions and more.