Fix Windows was Unable to Complete the Format Error

Tracy King updated on Dec 05, 2018 to Partition Master | How-to Articles

Windows was unable to complete the format error

"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?"
"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?"

Windows was unable to complete the format error

Formatting a Micro SD card, USB flash drive, pen drive, hard drive or SSD is a quite easy process and it’s not strange to most of us.

But sometimes you might face the 'Windows was unable to complete the format' error and another similar error 'the format did not complete successfully' caused by virus infection, bad sectors, storage device damage, disk write protection, etc. In this article, we will show you, step by step, how to fix 'Windows was unable to complete the format' error in two popular ways. 

Fix Windows was unable to complete the format error with Windows Disk Management

When you get 'Windows was unable to complete the format' error message, you can first try to fix this problem with the Windows Disk Management tool. All you need to do is to follow this path: 

  1. Step 1. Right-click the "My Computer" icon on the desktop and hit the "Manage" option.
  2. Step 2. Click on "Disk management" to open Windows Disk Management. 
  3. Step 3. Select the Micro SD card, USB or flash drive that you need to format, right-click and hit "Format". If there are any partitions on the drive, you should delete them all at first. 

Fix Windows was unable to complete the format error with EaseUS partition tool

If the first method does not work as expected, you can fix 'Windows was unable to complete the format' error with a third-party software - EaseUS partition tool. It is an easy-to-use and powerful application that can easily deal with any issue that you might experience when trying to format a USB drive. Here is the detailed guide. 

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 Windows 10 is supported


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

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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.