One of the best ways to save that data is to a USB flash drive. You might backup all of that important information to an external device. Or maybe you were given a USB/Pen drive that contains important data for you to use for either work or personal reasons. Either way, you have data you must retrieve. 

how to recover files from a formatted USB drive

But then, for some reason, that data isn’t accessible. You plug the drive into your Windows PC, the operating system recognizes the drive, but the data is either not there or you can’t retrieve it.

What do you do? 

First off, you don’t panic, as there are ways to retrieve that data, even when it appears to be completely lost. As long as the drive isn’t physically damaged, you have a very good chance to recover files, even from an accidentally formatted USB drive. 

What Is a “USB Drive not Formatted” Error?

In order for your computer to be able to read data from your USB drive, the drive must be formatted with a certain file system such that it’s accessible by the operating system. Every operating system has certain file system types they can read.

For example:

  • Windows can read and write to file systems like Fat32 and NTFS.
  • MacOS can read and write to HFS+ and APFS, and can only read NTFS.
  • Linux, on the other hand, can read and write to a large number of file systems, but generally defaults to ext3 or ext4. 

Formatted Drive: What Happened to My USB drive?

You might find, on a rare occasion, that you plug a USB drive into your Windows PC, only to receive the ‘USB drive not formatted’ error. There could be a number of reasons why you see this error:

  • The drive is damaged or corrupt;
  • The drive has an unrecognizable file system;
  • The drive was never formatted.

A drive can become damaged or corrupt for a number of reasons:

  • Misuse or abuse;
  • Malware or virus infection;
  • Power failure;
  • Bad sectors;
  • SMART errors.

If a drive has an unrecognized file system it generally means it was formatted on a different operating system. If a drive was never formatted in the first place, it does not and never did contain the data you’re looking for (so you might have the wrong drive).

How to Solve The “USB Drive not Formatted” Error?

When you do plug in a USB drive and the USB Drive not Formatted error appears, what do you do? If you’re certain you’ve used that drive before (and it contains data), make sure to not click Format disk.

how to recover a formatted usb drive


  1. Click Cancel and do nothing (for the moment).
  2. Your next step should be to run a scan on that formatted pen drive (or USB drive), so Windows can check it for errors. To do that, right-click the entry for the drive in the Windows File Manager and select Properties.
  3. In the resulting window, click Check so Windows can inspect it for errors (and fix them if possible).
  4. Once the scan is done, if Windows detected and repaired any errors, you should then be able to access the data on the drive.

If the Windows scan doesn’t make it possible for you to recover your data, you can try to recover it with a data recovery tool.

formatted USB flash drive

How to Recover Files from a Formatted USB Drive

If the Windows scan failed to help you retrieve the data from your formatted USB drive, you’re not out of luck. There are plenty of data recovery software titles available that are capable of recovering lost data from your drives. In fact, even if you accidentally clicked that Format button, when prompted (and Windows reformatted your pen drive), there’s still hope.

Some of the tools available are capable of diving deep enough to recover data from formatted USB drives that:

  • Have been formatted over;
  • Are damaged or corrupt (to a certain degree);
  • Have had data deleted.

Let’s take a look at the steps for recovering data from a pen drive that’s been re-formatted. For this process, we’ll use the Disk Drill USB recovery tool. On Windows, you can use the free version of Disk Drill and recover up to 500MB of data free. 

Disk Drill
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Steps to Recover Data from a USB Flash Drive on Windows

Here’s how you recover data from your formatted USB flash drives. I will assume you already have Disk Drill installed on Windows and have inserted your formatted pen drive into the PC.

Step 1: Open Disk Drill and click on the entry for the accidentally formatted or corrupt drive from the list of storage devices.

Step 2: Select All recovery methods from the drop-down and click Search for lost data.

Step 3: Allow Disk Drill to run and complete the scan. If you pause or stop the scan as it works, you could reduce the chances the tool will have of recovering your data. Depending on how large your drive is (and how much data is/was on it), this scan could take some time. If the drive was accidentally formatted over, Disk Drill will first search for (and hopefully) recover a lost partition.

Disk Drill running a scan on a USB pen drive.

Once the lost partition is found, Disk Drill will then begin searching for the lost data. Again, allow this process to complete to ensure the recovery success.

Step 4:  When the scan completes, click Review found items.

Step 5: Expand each entry for Found files, Reconstructed, and Reconstructed labeled until you find the files you want to recover. Before you select each item to recover, you should right-click the item in question and select Preview (or hover over the file listing and click the eye icon). If the file previews as expected, click the associated checkboxes for each item. 

Step 6: After you’ve selected the files to be recovered, click Recover and (when prompted) select a location to house the recovered files. Make sure not to select a destination that’s on the same drive you’re recovering from.

Locating a destination folder to house the recovered files.

Step 7: Click OK and Disk Drill will recover the files to the location you selected. 

Congratulations, you’ve found out (the easy way) that you can recover formatted flash drive data. 

Recovering a Formatted Flash Drive on Mac

Here is the procedure to recover files from a formatted USB flash drive on your Mac or MacBook. Before proceeding, make sure you have downloaded and installed Disk Drill for Mac on your machine. This procedure is essentially identical to the Windows recovery process outlined above.

Step 1: Connect the flash drive to your computer. You may need to use a USB to Thunderbolt converter on new MacBooks without a standard USB port.

Step 2: Launch Disk Drill and choose the flash drive from the list of available storage devices.

Step 3: Select All recovery methods from the scanning dropdown menu and then click the Search for lost data button.

Select device for recovery on Mac

Step 4: Let Disk Drill run until the scan is complete. This can take some time if you have a large capacity drive connected to your Mac, but you will obtain the best recovery results by letting the process finish. You can, however, pause and restart the scanning process if you wish. You can also recover files before the scanning is finished.

Step 5: When the scan is complete, click the Review found items button.

Review found files on Mac

Step 6: Navigate through the Found files, Reconstructed, and Reconstructed labeled file trees to locate the items you want to recover. From here, you can hover over a file and click the eye icon or select Preview to verify the file is indeed what you wish to restore. Check the checkboxes of the files you want Disk Drill to recover.

Step 7: Click the Recover button to complete the recovery process. You will be prompted to choose a safe location for the recovered data. Do not use the affected flash drive as this risks overwriting the data you want to recover.

Recover files on Mac

Step 8: Click OK and wait for the process to complete. Your files will be in your selected location on your Mac, ready to use with your applications.


Recovering data from a formatted USB drive isn’t nearly as challenging as you thought. And with the help of a tool like Disk Drill, even the question “How do I recover files from a formatted flash drive?” won’t fill you with dread. So the next time those pen drives wind up accidentally formatted, damaged, or corrupt, you now know the data housed within can be recovered.


Jack Wallen

Jack Wallen is an award-winning writer for TechRepublic, ZDNet, TechTarget and

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Approved by
Brett Johnson

This article has been approved by Brett Johnson, Data Recovery Engineer at ACE Data Recovery. Brett has a Bachelor's Degree in Computer Systems and Network, 12 years of experience.