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[Solved] Windows Was Unable to Complete the Format SD & USB

Updated on Dec 03, 2018 by Jean to Partition Manager

Summary:
If Windows was unable to complete the format on external hard drive, USB flash drive, SD card, pen drive, SSD and CD/DVD, fix the error with built-in Windows Disk Management or a third-party disk format utility.

"Windows was unable to complete the format" Error

How to format a removable disk (external hard drive, HDD, SSD, USB flash drive, SD card, pen drive & CD/DVD) if Windows was unable to complete the format? For example, if "Windows was unable to complete the format" on SD card, you should know that something goes wrong with the card. It's probably because:

Windows was unable to complete the format

  • The disk is write protected and Windows won't allow you to format the SD card;
  • The memory SD card is infected by the unknown virus;
  • The memory SD card is damaged or corrupted;
  • The memory SD card had some bad sectors.

Fix "Windows was unable to complete the format" Error in Windows 7/8/8.1/10 with Best Solutions

If Windows was unable to complete the format SD card, USB drive or CD/DVD, take the first step to remove viruses from the storage drive. If the format error remains, you should now turn to some advanced format tools.

Solution 1. Error "Windows was unable to complete the format," fix it by:

third-party format utility - EaseUS Partition Master

Download EaseUS partition magic software, then follow the steps to format your computer hard drive.

Download Now

 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

Smaller cluster size makes less wasting of disk space. The smaller cluster size is, the bigger file allocation table (FAT) will be. The bigger the FAT is, the slower the operating system works with the disk.

Solution 2. Error "Windows was unable to complete the format," fix it by:

Windows Disk Management program

Step 1: Right-click the computer icon in Windows 7 or This PC in Windows 8-10 and select "Manage." On the pops up window, from the right pane go to "Storage" -> "Disk Management."

Step 2: Now find the SD card or USB drive that shows unable to complete the format error. If there are any partitions on the drive, delete them all, and then you'll get a single volume.

Step 3: Right-click on the drive and hit "Format." Choose the NTFS file system if the device is larger than 4GB, or else choose the FAT32 file system.

format drive in Windows Disk Management to fix Windows was unable to complete the format