How to fix “windows was unable to complete the format”


7+ Fixes for Windows Was Unable to Complete the Format

This page explains the causes of “Windows was unable to complete the format” error and covers 5 practical ways to help all Windows users to get rid of this error efficiently from USB flash drive, SD card, external hard drive, etc., devices. If you were unable to format the USB or SD card, relax and follow guidelines here to complete the format with ease now. 

Error: Windows Was Unable to Complete the Format

Formatting a Micro SD card, USB flash drive, pen drive, hard drive or SSD is a quick process for ordinary users to change the device file system and restore its full capacity, and it’s not strange to most of us. But sometimes, you might fail to complete the format on a Windows computer as the cases shown below: 

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Windows was unable to complete the format error

Case 1 – Windows cannot complete format on USB

“Yesterday, Windows asked me to format my USB flash drive when I connected it to the computer. But I just got an error message ‘Windows was unable to complete the format’ when I tried to reformat it to FAT32. How can I fix this problem?”

Case 2 – Windows was unable to complete the format on the SD card

“I have a problem with my micro SD card. I can’t format it. I receive an error ‘Windows was unable to complete the format’, what can I do?”

So what is unable to complete the format? “Windows was unable to complete the format” is an error message that pops up in a window to warn users the Windows operating system cannot execute the formatting operation on your target devices so as to change the file system, setting the problematic device to usable again.

Stay calm when you are unable to complete formatting SD card, USB, external hard drive, or other devices on Windows PC. You should first check the causes of this error. Then you can follow the respective fix and refer to the guide steps remove the “Windows was unable to complete the format” issue from your device, completing the format.

Causes of Windows Unable to Complete Format Error

There are many causes that may prevent Windows from completing the format process on your devices. Here is a list of the main reasons that explain why Windows is unable to format the USB, SD card, or external hard drive, etc., devices:

#1. The device contains the file system error

Raw storage device

When a storage device displays as RAW or contains an unsupported file system such as Linux Ext2/3/4, Windows won’t be able to directly format the device by using File Explorer or Disk Management. To fix this error, you will need a third-party formatting tool for help. 

#2. Presence of bad sectors on USB, SD

When a storage device contains a certain number of bad sectors, you won’t be able to format it using Windows built-in tools. To make your device accessible again and complete the format on a USB/SD card, you can run disk error checking and a bad sector repair tool to clear the errors on your device.

#3. Virus or malware infection

When your storage device is infected by a virus or malware, you can neither access the saved data nor format the device in a normal way. You need to clear the virus at first and then complete the formatting process.

#4.The device is locked or write-protected by third-party software

If your USB or SD card gets locked or write-protected by third-party software, you cannot format the device either. The only way out is to remove the write protection first, and then finish formatting your SD, or USB drive.

#5. Physical damage 

When your storage device is physically damaged, you can do nothing to it. Either taking it to a local manual repair center or purchasing a new one to replace the damaged device is a good way out.

7 Fixes for “Windows Was Unable to Complete the Format” Error

In part, we will show you how to fix the ‘Windows was unable to complete the format’ error in 6+ practical ways. As the causes are different, the solutions may also be different. Check and follow the right solution to get rid of this error with ease now.

Method 1. Use EaseUS Partition Master to Fix Windows Unable to Complete Format Error

Applies to: Fix “Windows was unable to complete the format” caused by a file system error or unsupported file system on USB, SD card, hard drive, etc.

If your storage devices cannot be formatted due to file system error, such as USB shows RAW in Disk Management, EaseUS Partition Master can effectively format your device to a Windows supported file system such as NTFS, FAT32, or exFAT, etc., with ease.Free DownloadWindows 10/8.1/8/7/Vista/XP

Follow to see how to fix file system errors on your SD, or USB drive using this software and complete the formatting process in only a few simple clicks:

Step 1. Run EaseUS Partition Master, right-click the hard drive partition you intend to format and choose “Format”.

Format Hard Drive Partition - Step 1

Step 2. In the new window, set the Partition label, File system (NTFS/FAT32/EXT2/EXT3), and Cluster size for the partition to be formatted, then click “OK”.

Format Hard Drive Partition - Step 2

Step 3. Then you will see a warning window, click “OK” in it to continue.

Format Hard Drive Partition - Step 3

Step 4. Click the “Execute Operation” button in the top-left corner to review the changes, then click “Apply” to start formatting the partition on your hard drive.

Format Hard Drive Partition - Step 4

Method 2. Fix “Windows Was Unable to Format” Error Using Diskpart Command

Applies to: Resolve Windows unable to format USB, SD, or other device error due to file system or bad sector issue. 

When you failed to format USB, SD card, or other storage devices using Windows file explorer, the Diskpart formatting command can also help you complete the format.

Here are the steps:

Step 1. Right-clicking on Windows icon, type command prompt in Search, right-click on Command Prompt and select “Run as administrator”.

Step 2. Type diskpart in Command Prompt and hit Enter.

Step 3. Hit Enter each time when you type below command lines in DiskPart to quick format hard drive:

  • list disk
  • select disk 2 (Replace 2 with your disk number)
  • list volume
  • select volume 10 (Replace 10 with the volume number of the device that you want to format)
  • format fs=ntfs quick (If you need to format a storage device to FAT32 or other file systems, replace NTFS with FAT32exFAT, etc.)

Step 4. Type exit and hit Enter to close the program when DiskPart reports it has successfully formatted the volume.

Format device using diskpart command

Method 3. Remove “Windows Unable to Format” Error on RAW Device in Disk Management

Applies to: Get rid of “Windows was unable to complete the format” error caused by RAW file system error on USB, SD card, hard drive, etc.

When your storage device becomes RAW and Windows warns that it was unable to complete the format, you may try Windows Disk Management to complete the formatting:

Step 1. Connect your device to your PC if you want to format a removable device.

Step 2. Right-click on This PC and click “Manage”, and select “Disk Management”.

Step 3. Locate and right-click on your USB flash drive or external hard drive, and then select “Format”.

Step 4. Set the file system of your USB, SD card, or hard drive to NTFS or FAT32, tick “Quick Format” and click “OK” to confirm.

Format USB to FAT32.

Method 4. Clear Virus and Complete the Format on Windows

Applies to: Resolve “Windows was unable to complete the format” issue on a locked device due to virus or malware infection.

If your device is locked or infected by virus or unknown malware, Windows computer won’t be able to format your USB, SD card, or other storage devices. The best way to get rid of this issue is to run virus cleaning software and unlock the device.

Step 1. Connect your external storage device like USB or SD card to your PC.

Step 2. Run a virus cleaner, malware removal tool, or antivirus software on your PC, select the target device to clear the existing virus, malware.

Step 3. After this, you can reformat the device again using Windows File Explorer or the former three formatting tools.

You can also remove virus without antivirus by using Windows Defender and enable the real-time virus protection feature. It also works to protect your device and data against viruses and malware infection. 

Method 5. Remove Write Protection from Device and Complete the Format

Applies to: Remove write protection and enable Windows to complete the format on USB, SD card, external hard drive, etc., devices.

If your target device is locked or write-protected by a password or third-party software, Windows cannot directly format your storage device. You will need to unlock the device first, and then complete the format:

First. Remove Device Write Protection – 3 Ways

#1. Unlock USB/SD card

Step 1. Connect your device to your PC.

Step 2. Remove the switch of your USB or SD card to the OFF side.

Unlock USB

Then you can retry to format the device on Windows using File Explorer or other devices.

#2. Remove write protection from USB/SD

Here is a write protection removal tool named EaseUS CleanGenius for you to apply and directly remove the write protection from your device:

If you don’t consider yourself a pro-computer user and you’re not familiar with command-lines, don’t worry. There are graphical-based solutions to help you remove write-protection from your hard drives, USB drives, and even SD cards.

EaseUS CleanGenius is one of these tools that helps you fix aforementioned issues on your drives without knowing a thing about command-line.

Here’s an easy-to-follow guide on how to use this tool to get your issues sorted:

Step 1:  DOWNLOAD and install EaseUS CleanGenius (free) on your computer.

Step 2: Run EaseUS CleanGenius on your PC, select Optimization and choose the Write Protection mode.

disable write protection

Step 3: Select the device that is write-protected and click Disable to remove the protection.

Disable Write Protection from storage devices.

#3. Unlock device using a password or third-party software

If your storage device is write-protected by using a password or third-party software, you will need to reuse the password or the software to unlock your SD, USB, etc., devices.

Next. Format the Device – Complete Windows Formatting

Now, you can reformat the device with Windows File Explorer, Disk Management, Diskpart command, or EaseUS Partition Master.

Step 1. Connect USB, or SD card that you want to format to your PC and open up Windows Explorer.

Step 2. Right-click on the connected device and select “Format”.

Step 3. On the format window, select the desired file system – NTFS for hard drive partition, FAT32 for 32GB SD/USB, and exFAT for 64GB or bigger SD/USB.

Step 4. Tick “Quick format” and click “Start”.

format SD card using file explorer

Method 6. Check and Fix Disk Errors that Prevent Windows from Completing the Format

Applies to: Resolve “Windows unable to format” device error due to disk error. 

Step 1. Open File Explorer, connect your device to PC and right-click on the problematic device, select “Properties”.

Step 2. Under the Tools tab, click the Check button under “Error checking”.

check and fix disk error on storage device

Step 3. Next, you can choose to Scan drive if wanted or Repair drive if errors were found.

Wait for the process to finish.

Step 4. Now, you can right-click on your device and complete the format using Windows File Explorer.

Method 7. Repair Bad Sector that Disallows Windows to Format Storage Device

Applies to: Fix and repair soft bad sectors that stops Windows from formatting device.

When a storage device contains a bit few soft bad sectors, you can’t format it using the Windows formatting tool. You can either apply EaseUS Partition Master with its File System Checker to repair bad sectors or run CMD command to repair soft bad sector first and then complete the format:Free DownloadWindows 10/8.1/8/7/Vista/XP

Step 1. Run CHKDSK command to fix soft bad sectors.

1. Type cmd in the Search box, right-click “Command Prompt” and choose “Run as administrator”.

2. Type chkdsk E: /f /r /x and hit Enter. (Replace E with the drive letter of your storage device.)

Fix soft bad sectors using CHKDSK command

Step 2. Format storage device to usable again

1. Open Windows File Explorer, locate and right-click on your hard drive.

2. Select “Format”, reset the file system as NTFS, tick “Quick Format” and click “Start”.

Bonus Tip: Recover Lost Data after Completing Windows Format

Applies to: Restore lost data from a faulty storage device after resolving the “Windows cannot complete the format” error and formatting the device.

When you finish formatting the faulty storage device which Windows was unable to format, you may lose the saved data. The only thing that you can do is to turn to reliable data recovery software and restore precious data immediately.

Here, we would like to recommend you try EaseUS Data Recovery Wizard. It supports to scan and restore all your data in only 3 steps as long as the device can be detected by a Windows computer:

Step 1. Launch EaseUS Data Recovery Wizard, hover on the partition which you want to recover data from, and click “Scan”.

Step 2. Wait for the scan to complete. Then, select the files you’d like to recover.

Step 3. After selecting the files, click Recover and choose a location to save the recovered files at. Make sure not to pick your storage device that made you lose your files.

After restoring the precious data, you can re-save your data back to the USB or SD card again.


This page answers the question of “How do I fix Windows was unable to complete the format?” with 7  to help you effectively resolve this issue on your USB, SD card, external or internal hard drive.

For a reliable and effective formatting software, EaseUS Partition Master is recommended for you to try. It makes everything easy for you to format the device in Windows PC. If you have other advanced partitioning requests, it also can help.

FAQs about Formatting Hard Drive

If you have other more questions in formatting devices, check and find answers in the following FAQs:

1. How do I fix a hard drive that won’t format?

First, you need to check the hard drive state: whether Windows can detect the hard drive.

If yes, apply EaseUS Partition Master to directly format your hard drive with provided steps in Method 1 on this page.

If not, or your hard drive displays as unknown or unallocated, create a new partition on your hard drive and reformat the hard drive.

2. Why can’t I format my hard drive?

As described on this page, when your hard drive gets locked, damaged, or contains file system error, bad sectors, or even virus-infected, you can’t directly format it.

To resolve this issue, you can try the three methods:

1). Unlock hard drive using password or third-party software;

2). Clean up virus and malware from the hard drive;

3). Format hard drive using EaseUS Partition Master, Diskpart, or Disk Management formatting tool.

For more details, follow the provided methods on this page for a guide.

3. How do I fix my flash drive unable to format?

When you are unable to format a flash drive, try the following steps:

Step 1. Connect the flash drive to the PC and unlock the USB if it’s locked.

Step 2. Run virus cleaner software to remove hidden viruses, malware.

Step 3. Run Windows Disk Management or EaseUS Partition Master

Step 4. Right-click the USB flash drive and select “Format”. Set a new file system for the drive.

Step 5. Reset the file system for the flash drive and click “OK” to confirm.

After this, you can reuse the flash drive to transfer data and save files again.

Causes Behind Windows Can’t Format USB Drive, Memory Cards, Hard Drive

There are numerous causes of this issue, some of them are mentioned here below. Let’s have a look one by one –

  • Virus Infection: This is one of the prime reasons that can easily corrupt any data storage device. If your data storage device is corrupted or infected with a virus then it will corrupt the data stored within it and you may not be able to perform many tasks such as reading data or formatting.
  • Bad Sector Present in Storage Devices: Storage devices have small sectors that are the smallest unit for storing data. Bad sectors mean that sector is damaged and the read and write process can not be done. So, the availability of a bad sector can be one of the reasons that do not allow Windows to format the drive.
  • Data Storage Device Damage: Another reason is physical damage that makes the data stored within the storage device inaccessible. The computer may not be able to format the storage device if it can’t use the device because it is damaged physically such as a circuit board or chip is not working, etc.
  • Storage Devices is Write-Protected: If your storage device is write-protected, you may get an error message “The disk is write-protected. Remove the write-protection or use another disk.”, while you try to transfer files from it. You must know that formatting is a kind of writing operation and therefore you have to remove write protection from your SD card.

So, these are some common reasons that do not allow Windows to format the storage device. Fortunately, there are few solutions that will help you to resolve “Windows was unable to complete the format” error.

Fix “Windows Was Unable to Complete the Format” Error On SD Card & USB Drive

When you are not able to format your storage devices like memory card, USB drive, pen drive, SD card using the normal process, then you must try the below-mentioned solution to fix this problem.

#1: Format Via Disk Management

The first method that you can try to fix ‘Windows was unable to complete the format SD card‘ error by using Disk Management utility.

Here are the easy steps by following which you can format the device using Disk Management.

  • At first, connect your storage device that you need to format with your system.
  • Make right-tap “This PC” >> click on “Manage” >> select the “Disk Management“.
  • Find & right-click the external storage device >> select the “Format“.
Disk Management Tool
  • Here, you need to set a file system (FAT32 or NTFS) of the hard drive >> tick on “Quick Format” >> click the “OK” option to proceed.
Windows was unable to complete the format SD card

However, if there is any partition on the drive, then you have to delete the partition before you follow this process.

#2: Use The Diskpart To Fix Windows Was Unable To Complete The Format

Another solution that you can try to troubleshoot Windows was unable to complete the format USB is to use the Diskpart command line.

Follow the below-given steps to format the memory card with Diskpart:

Step 1: Just right-click on the Windows icon

Step 2: In the search box, type the command prompt 

Step 3: Then, right-click the Command Prompt >> select the “Run as an administrator“.


Step 4: Now, type the diskpart in a Command Prompt & hit the Enter.


Step 5: At this time, type the beneath command lines one after another in DiskPart and hit Enter after each command

  • list disk
  • select disk 2 (you need to replace the 2 number with the disk number)
  • list volume
  • select volume 10 (you have to replace 10 number with a volume number)
  • format fs=ntfs quick (suppose if you want to format your storage device in exFAT or FAT32 then replace the NTFS with exFATFAT32, etc.)

Step 6: At last, type the exit >> hit the Enter in order to close a program once DiskPart reports that formatted process of the volume is over.


#3: Format In A Safe Mode And Fix ‘Windows Was Unable To Complete The Format’ Issue

If the above two approaches don’t help you, try to format the memory card or USB drive in a Safe Mode.

In order to boot the PC in a Safe Mode, just follow these steps:

Step 1: Simply tap on a Start menu and then go to the Settings

Step 2: Choose the Update and Security option >> Recovery.

Update & Security

Step 3: Next, go to the Advanced Startup and then tap on Restart Now

Step 4: Now the computer will restart in order to open the screen Choose an option

Step 5: Tap on Troubleshoot and then Advanced Options

Advanced option

Step 6: In the sixth step, you have to tap on Startup Settings then Restart

Step 7: When your system restarts, press the ‘F4’ button to begin your computer in a Safe Mode.

Once your PC started in a Safe Mode, try the same steps and format your storage device again.

#4: Check & Fix The Disk Errors 

In this solution, I’ll guide you on how to fix Windows was unable to complete the format USB flash drive using a Disk checking utility.

Let’s try out these instructions:

  • At first, open the File Explorer and then connect your storage drive to a computer
  • Next, right-click a problematic device >> select the “Properties“.
  • In a Tools tab, you need to click an “Error-checking” >> then Check.
  • After that, select the Scan drive if issues are found. Here, you need to wait until the process gets finished.
error checking tool
  • Lastly, right-click the device & finish a format by using File Explorer.

#5: Remove Write Protection

Sometimes, the Windows system can show the error “Windows was unable to complete the format” if it is write-protected.

There are some memory cards and thumb drives that have a write-protect switch. You need to first check whether it has that switch and if so then ensure that it is unlocked.

The first thing you can do to remove write protection using the Windows system is:

  • You need to first click on “Start” button and then type gpedit.msc in the search box and then press “Enter” key.
  • You need to then select “Administrative Templates” under the section ‘Computer Configuration’ and then click ‘System’.
write-protection-Administrative Templates
  • Here, you have to choose Removable Storage Access.
write-protection-Removable Storage Access
  • Now, find Removable Disks: Deny write access in the appeared list.
write-protection-Removable Disks
  • Next you have to select “Disabled” from the three specified options.
  • Next, you have to click on the button “Apply” and then reboot the Windows system.

NOTE: When your system reboots with the new parameters, simply try to format your device.

#6: Clear Virus & Complete A Formatting


If your memory card, hard drive, and USB flash drive get infected by malware or virus and won’t able to format the drive then running the antivirus software storage devices can help you.

Here is how you can run the antivirus software:

Step 1: Attach your storage device such as SD cards or USB flash drive to your Windows system.

Step 2: In the second step, you need to run the Antivirus tool on your computer, choose a target drive to clear an existing malware or virus.

Step 3: Now, try to format the device by using Disk Management, Windows File Explorer, Diskpart, or other formatting tools.

#7: Repair the Bad Sector Which Disallows You to Format the Storage Device

Most of the time, it happens that bad sectors present on the storage device prevent from formatting it.

So, in such a situation, you need to repair and recover the SD card with bad sectors or another device by running the CMD command:

Try the below steps and then run the chkdsk command prompt to fix Windows was unable to complete the format USB drive easily.

# Run The CHKDSK To Solve Bad Sectors

  • First of all, in a search box, you have to type cmd.
  • Next, right-click the “Command Prompt >> choose the “Run as an administrator“.
  • After this, type the chkdsk E: /f /r /x & hit the Enter. (Simply replace the E with your storage device’s drive letter).
chkdsk E: /f

# Format The Storage Media To Use It Again

  • First, open a File Explorer, then locate & right-click the faulty hard drive.
  • Choose the “Format” >> reset a file system as a FAT32 or NTFS
  • Now, tick the box “Quick Format” >> click “Start“.

Recover Data From Storage Media After Formatting It

After you finish formatting your faulty storage media all your data stored within it will be lost. Though, if you have backup then you can restore those stuff from there.

In case, if you don’t have a backup, that time the only thing that you can do to recover data from an external storage device is to use reliable Hard Drive Data Recovery software.

With the help of External Storage Data Recovery software, you can:

  • Restore media files from data storage devices that can’t be formatted due to the “Windows was Unable to Complete the Format” error.
  • Recover deleted, lost, formatted, virus-infected media files like photos, videos, and audio files from memory cards, hard drives, external hard drives, USB flash drives.
  • Read-only program, 100% clean, safe & easy to use.

Recover data from Storage Device That Windows Was Unable To Format

* Free version of the program only scans and previews recoverable objects.

You need to only download and install this program on your Windows and Mac OS and follow its step-by-step guide. Doing so will help you to recover data from formatted hard drives easily.

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