Skip to content Skip to sidebar Skip to footer

How to Overcome Windows Was Unable To Complete The Format

How to Overcome Windows Was Unable To Complete The Format

When you plug a flash drive into your laptop or computer, has a message ever appeared in the form of “Windows Was Unable To Complete The Format”?

The message directs you to format the flash drive and delete all files on it.

It doesn’t matter if there are no important files on the flash drive, but what if there are important data such as letters or office work files?

Of course this will be a big problem, especially if we don’t have a backup file.

As much as possible we should try to save important files first, but if it can’t be helped then we are forced to format it.

This problem has often occurred among flashdisk users, both those with capacities from 1GB, 2GB, 4Gb, 8GB, 16GB, 32GB and 64GB.

That’s why it’s very important that we back up important files so that things don’t happen.

For example, copying to an external hard drive or storing it on laptop storage.

How to solve Windows Was Unable To Complete The Format below, maybe it can help you.

Cause Windows Was Unable To Complete the Format

You need to know that there are many things that can cause the message “Windows Was Unable To Complete the Format” to appear, for example as follows:

  • Flashdisk infected with a virus
  • Not ejected
  • Just plug in the laptop

What is vulnerable is a flash that is not “ejected” first or immediately removed after copying data.

Even worse, when the data copying process is running, it is often immediately revoked. That’s what can make the flash quickly damaged.

If you find something like the above, don’t rush to click “OK” first if you don’t want all your flash data to be lost.

First try some of the tips below which hopefully can be applied properly and successfully.

How to Overcome Windows Was Unable To Complete The Format

To overcome this, then you can try several ways that might help you to overcome the problem.


The main possible cause of this “Windows Unable To Complete The Format” problem is because the flash drive is in a state of write-protect and has been attacked by malware. This apparently can also happen to other drives on the hard disk.

If left alone, it could be that the malware can spread. Therefore, here are some steps that you need to do.

  1. First, first plug the flash drive that has the problem into your laptop or PC.
  2. After that, right click on the flash disk and click on options Manage.
  3. Later a new window will appear, and on the flash disk there will be writing Unallocated.
  4. Then right-click on the Unallocated text and select Options New Simple Volume.
  5. Then New Simple Volume Wizard will start the process, and you need to click Next.
  6. On the window Specify Volume Size furthermore, you also just need to select the option Next.
  7. Then you can choose the letter in the Drive Letter as you wish, and click Next again.
  8. Make sure you select the option FAT32 on the File System menu, and fill in the Volume label with the desired name and then click Next.
  9. Last click Finish and you can use the flash drive again.

If the method above doesn’t work, please do the method below which has been proven to be successful by some users.

Meanwhile, for those who experience the flash cannot be formatted because Write Protectedyou can read how to do it at

Via Disk Management

If you feel that the method described above is still too complicated, then there is no need to panic. You can try to solve the problem in the form of “Windows Was Unable To Complete The Format” through Disk Management.

Although this method is quite easy, you still have to do it carefully so that you don’t make mistakes. Here are some steps that you need to do.

First, first plug the flash drive into the PC or laptop you are using.

If so, open the Start menu then click on the search field and write down Disk Management.

If you’ve found it, then open the Disk Management.

On the start page of Disk Management, you need to make sure if the flasdisk is read in it.

windows was unable to complete the format flash disk

Then right-click on the flash drive in question and select Options Format.

how to solve the format did not complete successfully

If a warning appears, you can directly click the option Yes.

how to fix the error windows was unable to complete the format

After that, uncheck the option Quick Format and select OK.

windows memory card was unable to complete the format

Wait until the flash formatting process is completely finished.

windows cannot format this drive

When the flash format process is complete, then you can use it again.

Image source:

Also read: How to Overcome This App Has Been Blocked For Your Protection

The two ways to overcome Windows Was Unable To Complete The Format described above, then the flash you have can now be used normally again. However, you need to know that all the files on the flash will be lost. This is because these files are lost with all the malware that attacks.