USB recovery, step by step

How to Recover Data from Corrupted USB Flash Drive? (2026)

A corrupted flash drive is not automatically empty. Start with the least destructive recovery route, save files elsewhere, then repair or replace the USB.

By Ditchnet Articles Editorial Team Published · Updated
Quick answer

Stop writing to the USB, dismiss any format prompt, then create a byte-to-byte image if the device is unstable. Scan that image with Disk Drill, preview the important files, then recover them to a separate drive. Leave CHKDSK or First Aid until after the data is safe.

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Do not format the USB or recover files back onto it. If it keeps disconnecting, gets hot, shows the wrong capacity, or has a damaged connector, stop testing it. Repeated reads can turn a recoverable hardware fault into a dead device.

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Recover Files from a Corrupted USB → Disk Drill

Creates byte-to-byte USB images · Scans RAW or inaccessible storage · Previews found files before recovery · Windows plus Mac

✓ Free scan plus preview ✓ 100 MB free on Windows ✓ Windows plus macOS
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Top 5 Ways to Recover Data from a Corrupted USB Flash Drive

01

Recover the USB with Disk Drill

Best first move when the drive appears in Disk Management or Disk Utility

~15–60 min
Difficulty Easy
You need Disk Drill plus a second drive
Works for Windows, Mac

Use this route when the USB is detected but will not open, appears RAW, requests formatting, or shows missing folders. Disk Drill can scan the device directly, though a byte-to-byte image is safer if the flash drive disconnects, freezes, or reads very slowly.

  1. Stop using the corrupted USB. Do not format it, save new files to it, or accept an operating-system repair prompt.
  2. Install Disk Drill on the computer's internal drive, not on the damaged flash drive.
  3. Open Byte-to-byte Backup, select the USB, then save its image to a healthy disk with free space equal to the USB's full capacity. Skip imaging only if the device reads normally.
  4. Return to Storage Devices, attach the image, select it, then click Search for lost data. Choose Universal Scan for an ordinary USB flash drive.
  5. Review the results by file type, date, or filename. Preview several important files before selecting them.
  6. Click Recover, then save the recovered files to a different physical drive. Never restore them onto the corrupted USB.
Disk Drill Review ↗
i Disk Drill can scan plus preview files for free. The Windows edition currently includes up to 100 MB of free recovery, while larger recoveries normally require a paid license.
Open the Disk Drill website
02

Copy Every File That Still Opens

Quickest option when the USB remains partly readable

~5–30 min
Difficulty Easy
You need A healthy destination drive
Works for Windows, Mac, Linux

A corrupted USB sometimes stays accessible long enough to rescue ordinary files. Copy the irreplaceable material first rather than sorting, renaming, or opening dozens of files on the unstable device.

  1. Connect the USB directly to the computer rather than through an unpowered hub.
  2. Create a new recovery folder on the computer or another healthy external drive.
  3. Copy the smallest, most important folders first. Documents usually move faster than large videos.
  4. If one file causes the transfer to freeze, cancel that item, reconnect the USB once, then continue with another folder.
  5. Open a sample of the copied files from the destination drive to confirm that they are usable.
  6. Use recovery software for files that are missing, unreadable, or blocked by repeated input/output errors.
i A normal copy cannot retrieve deleted files or data hidden behind a damaged file system.
03

Repair the USB with CHKDSK

A Windows-only attempt for logical file-system errors after recovery

~5–45 min
Difficulty Moderate
You need Windows Terminal or Command Prompt
Works for Windows

CHKDSK can repair some directory, allocation, or file-system errors on a USB that has a valid drive letter. It changes the file system while working, so recover or image important data before running it.

  1. Open File Explorer, note the USB's drive letter, then verify it again so you do not target the wrong disk.
  2. Right-click Start, open Terminal (Admin) or Command Prompt (Admin).
  3. Run chkdsk E: /f , replacing E: with the actual USB drive letter.
  4. Let the check finish without unplugging the flash drive, even if progress pauses for several minutes.
  5. Reconnect the USB, then inspect its folders. Look for recovered fragments only after checking the normal folder structure.
  6. Immediately copy any newly accessible files to a healthy disk.
i Do not run CHKDSK first if the USB disconnects, reports the wrong capacity, clicks through an adapter, or contains the only copy of critical data.
04

Run Disk Utility First Aid

The built-in Mac repair route for directory or formatting faults

~5–20 min
Difficulty Easy
You need Disk Utility
Works for Mac

Disk Utility First Aid checks a storage device's formatting plus directory structure, then repairs certain logical errors. As with CHKDSK, use it after copying, imaging, or recovering valuable files because repairs can alter damaged metadata.

  1. Open Disk Utility from Applications > Utilities.
  2. Choose View > Show All Devices so the physical USB plus its volumes appear in the sidebar.
  3. Select the lowest volume beneath the USB, click First Aid, then choose Run.
  4. Repeat First Aid for any remaining volumes, moving upward until you reach the physical USB device.
  5. Eject the USB normally, reconnect it, then check whether the missing folders are accessible.
  6. Copy recovered files to the Mac or another healthy drive before reformatting the USB.
i If First Aid cannot see the physical device, software repair is unlikely to solve a connection or hardware failure.
Read Apple's First Aid instructions
05

Send the USB to a Recovery Lab

Safest choice for broken connectors, heat damage, or unstable hardware

~3–10 days
Difficulty Easy to arrange
You need A data recovery lab
Works for Physically damaged USB drives

A specialist may read the NAND memory directly when the connector, controller, circuit board, or another physical component has failed. This is the expensive route, yet it avoids making severe hardware damage worse through repeated DIY attempts.

  1. Unplug the USB if it becomes hot, smells burned, bends at the connector, disconnects constantly, or reports an obviously incorrect capacity.
  2. Do not open the casing, solder the connector, freeze the drive, or move memory chips yourself.
  3. Photograph the flash drive plus any visible damage before packing it.
  4. Contact a lab that specifically handles USB flash memory, controller failures, plus chip-off or monolith recovery.
  5. Ask about evaluation charges, approval limits, return-media costs, confidentiality, plus what happens if no usable data is recovered.
  6. Pack the device in an antistatic bag or small protective case, then use tracked shipping.
i For legal evidence, business records, or the only copy of family media, a lab may be the sensible first method rather than the last.

When DIY USB Recovery Can Make the Damage Worse

Software methods assume the computer can maintain a reasonably stable connection to the USB. Stop if the device vanishes during every read, heats up quickly, has a cracked connector, appears as zero bytes, or reports a capacity that bears no relation to its label.

Those symptoms often point beyond an ordinary file-system problem. Repeated scans may add wear or prevent a lab from getting the cleanest possible read, so unplug the device plus keep it protected.

Choose a Recovery Method for a Corrupted USB Drive

Start with the least destructive option that matches the drive's condition.

Method Best for Time Success rate
1. Recover the USB with Disk Drill TRY FIRST RAW, inaccessible, formatted, or partly corrupted drives ~15–60 min ● 82%
2. Copy Every File That Still Opens Partly readable USB drives ~5–30 min ● 95%
3. Repair the USB with CHKDSK Windows file-system errors ~5–45 min ● 64%
4. Run Disk Utility First Aid Mac directory or formatting errors ~5–20 min ● 62%
5. Send the USB to a Recovery Lab Broken connectors or physical failure ~3–10 days ● 70%

Which Corrupted USB Recovery Method Should You Use?

Start with Disk Drill if the USB still appears in Disk Management or Disk Utility, especially when it shows as RAW, asks to be formatted, or has missing folders. Create an image first when the device behaves unpredictably, then scan the image rather than stressing the original.

Use a direct copy only for files that remain readable. Save CHKDSK or First Aid for later because repair utilities modify the file system. A physically damaged drive belongs with a flash-memory recovery lab.

Top pick Disk Drill
Recover the irreplaceable files first, verify them from a separate drive, then reformat or replace the corrupted USB instead of trusting it again.

Corrupted USB Recovery Questions

How do I recover files from a corrupted USB flash drive without making it worse?
Stop using the drive right away, then plug it into a different USB port or computer just long enough to copy anything that still opens. If Windows asks to format it, cancel the prompt until you have tried recovery tools or made a sector-by-sector image of the drive.
What is the first thing I should do when my USB drive says it needs to be formatted?
Do not format it if you need the files back. First, try opening it on another computer, then use recovery software to scan the drive before attempting any repair steps that could overwrite data.
Can I recover data from a USB flash drive that is not showing up in File Explorer?
Yes, sometimes. Check Disk Management or Disk Utility first to see whether the drive is detected at all, then use recovery software if the device appears with the wrong file system or as unallocated space.
Should I run CHKDSK on a corrupted USB flash drive?
Only after you have tried to recover the files you need, because CHKDSK can change damaged file structures. It can help with logical corruption, but it is a poor first move if the files are still valuable.
What software is best for recovering files from a corrupted USB drive on Windows?
Look for tools that can scan raw sectors, preview recoverable files, and save results to a different drive. Popular options include Recuva, R-Studio, EaseUS Data Recovery Wizard, and Disk Drill, but the right choice depends on how damaged the drive is.
How much does USB flash drive data recovery usually cost?
Software recovery can be free or low cost if the drive is readable enough for a scan. Professional recovery is much more expensive because it may involve chip-level work, cleanroom handling, or controller repair.
Is it possible to recover files from a USB drive after accidental formatting?
Often yes, if you stop using the drive immediately. A quick format usually removes file system references more than the actual data, so recovery software may still find many files unless the drive has been reused.
Can I recover data from a physically damaged USB flash drive?
Sometimes, but it depends on the damage. If the connector is bent, the plastic shell is cracked, or the device gets very hot, a professional lab is the safest route because repeated plugging can make the failure worse.
What is the difference between logical corruption and physical failure on a USB drive?
Logical corruption means the file system or partition table is damaged, but the hardware still works. Physical failure means the flash memory, controller, or connector has failed, which usually needs advanced recovery instead of software alone.
How do I copy files from a USB drive that freezes when I open it?
Try a different USB port, then copy one small folder at a time instead of the whole drive. If the drive stalls repeatedly, make a disk image first, then recover from the image rather than the original device.
Why does my USB flash drive ask to be formatted every time I plug it in?
That usually means the file system is unreadable or the partition table is damaged. You may still be able to recover the data with recovery software before repairing or reformatting the drive.
Can I recover deleted files from a corrupted USB drive too?
Yes, deleted files may still be recoverable if the sectors have not been overwritten. Scan the drive with recovery software that can search for deleted entries plus raw file signatures.
What files are hardest to recover from a corrupted USB flash drive?
Small files with weak file signatures, fragmented videos, encrypted archives, plus data from drives with heavy wear are often toughest. Documents, photos, plus simple media files usually have better recovery odds if the drive still responds.
Should I use CMD, Diskpart, or repair tools before trying recovery?
Not if the data matters. Command line repair tools can rewrite partitions or file system metadata, so recover first, then repair the drive only after you have copied the files elsewhere.
How long does USB flash drive recovery take in October 2026?
It can take a few minutes for a simple scan or many hours for a large, badly damaged drive. Time depends on drive capacity, connection speed, plus how many bad sectors the software has to skip.
Are free USB data recovery tools good enough for a corrupted drive?
They can be, if the drive is only lightly damaged or recently formatted. For severe corruption, advanced preview, raw scanning, plus better file reconstruction in paid tools can make a real difference.
What should I do if recovery software finds the files but saving them fails?
Save the recovered files to a different drive with plenty of free space, then try exporting smaller batches. If that still fails, clone the USB first, then run recovery on the clone instead of the original stick.