How to Fix External Hard Drive Shows RAW File System (No Format)

Introduction

When your external hard drive shows raw file system, it means Windows cannot recognize the file system structure. Instead of NTFS, FAT32, or exFAT, the drive appears as RAW in Disk Management.

An external hard drive shows raw file system typically indicates corruption, improper ejection, or physical damage. This guide provides proven methods to fix the RAW drive without formatting, recover your data, and restore normal file system access.

For official guidance, Microsoft’s documentation explains how to manage disks and identify RAW volumes.

Additionally, the CHKDSK command reference provides context on repairing file system errors.

This article builds on those authoritative sources to deliver a complete step‑by‑step recovery plan.

For broader Windows troubleshooting, explore our Windows 11 troubleshooting hub which covers system‑level disk issues.

Why External Hard Drive Shows RAW File System

Understanding why external hard drive shows raw file system helps you choose the right fix.

A RAW file system means Windows cannot read the drive’s file system metadata. The drive’s partition table may be corrupted, the boot sector may be damaged, or the file system may have been overwritten.

Common causes include improper ejection without safely removing hardware, power surges or disconnections during data transfer, file system corruption due to bad sectors, virus or malware attacks, and physical damage to the drive’s controller or platters.

Never format a RAW drive immediately—you will lose all data. Data recovery should always come first.

Check Disk Management for RAW Status

Before attempting any fix, confirm that your external hard drive shows raw file system in Disk Management.

1. Press Win + R, type diskmgmt.msc, and press Enter.
2. Locate your external drive in the list. Check the File System column.
3. If it says RAW, your drive is in the RAW state.
4. Note the drive letter and capacity—you’ll need this information.

If the drive does not appear at all, there may be a physical connection issue. Proceed to Method 8 for hardware checks.

Use CHKDSK to Repair the RAW Drive

CHKDSK can sometimes repair a RAW drive if the file system corruption is minor. This is the first step when external hard drive shows raw file system.

1. Open Command Prompt as Administrator.
2. Type chkdsk X: /f (replace X: with your drive letter).
3. If CHKDSK runs successfully, it may repair the file system and return the drive to NTFS or FAT32.
4. If CHKDSK fails with “The type of the file system is RAW”, proceed to the next method.

If CHKDSK is unable to run, the damage may be more severe, requiring partition table recovery or data recovery software.

Assign a Drive Letter to the RAW Partition

Sometimes a drive that shows raw file system simply lacks a drive letter, preventing access. Assigning one can resolve the issue.

1. Open Disk Management (diskmgmt.msc).
2. Right‑click the RAW partition and select Change Drive Letter and Paths.
3. Click Add and assign a new drive letter.
4. Check File Explorer to see if the drive becomes accessible.

If the drive becomes accessible but still shows RAW, you may need to recover data using third‑party tools before formatting.

Use TestDisk to Rebuild the Partition Table

TestDisk is a free, open‑source tool designed to recover lost partitions and fix RAW drives. It’s highly effective when external hard drive shows raw file system due to partition table corruption.

1. Download TestDisk from the official website and extract the files.
2. Run testdisk_win.exe as Administrator.
3. Select the external drive and choose Proceed.
4. Select the partition table type (Intel for MBR, EFI GPT for GPT).
5. Choose Analyse to search for lost partitions.
6. Select Quick Search to find deleted partitions.
7. If found, highlight the partition and press P to list files (to verify).
8. Press Enter to confirm the partition structure and write the new partition table.

TestDisk can often restore the file system without data loss. Always create a disk image before writing changes if you are unsure.

Recover Data with Third-Party Recovery Software

If CHKDSK and TestDisk fail, third‑party tools can recover data from a RAW drive before formatting. This is essential when external hard drive shows raw file system and you need to save files.

1. Download reputable software like EaseUS Data Recovery Wizard, Recuva, or Stellar Data Recovery.
2. Install and launch the software.
3. Select the RAW drive and choose Scan.
4. Wait for the scan to complete (this may take 10–30 minutes depending on drive size).
5. Preview found files and select the ones you want to recover.
6. Save recovered files to a different drive (not the RAW drive).

After recovering your data, you can safely format the drive to restore normal file system access.

Use Diskpart to Clean and Convert the Drive

If the drive shows raw file system and you have already recovered your data, you can use Diskpart to clean and convert the drive.

1. Open Command Prompt as Administrator.
2. Type diskpart and press Enter.
3. Type list disk to see all disks.
4. Type select disk X (replace X with the disk number of your external drive).
5. Type clean to remove all partitions and data.
6. Type convert mbr or convert gpt depending on your preference.
7. Type create partition primary to create a new partition.
8. Type format fs=ntfs quick to format the drive as NTFS.
9. Type assign letter=Z (replace Z with an available drive letter).

Warning: This method erases all data. Only use it after recovering your files.

Change the File System with Format (After Data Recovery)

If the drive shows raw file system and you’ve recovered your data, formatting is the simplest way to restore normal operation.

1. Open Disk Management (diskmgmt.msc).
2. Right‑click the RAW partition and select Format.
3. Choose NTFS (or exFAT for larger drives and cross‑platform compatibility).
4. Enable Quick Format and click OK.
5. Wait for the format to complete.

After formatting, the drive should appear with the correct file system and be fully accessible.

Check for Physical Damage or Cable Issues

Sometimes an external hard drive shows raw file system due to physical connection problems rather than file system corruption.

1. Try a different USB cable or port.
2. Connect the drive to another computer to see if it appears correctly.
3. Check the drive for unusual noises—clicking or grinding indicates physical failure.
4. Use CrystalDiskInfo to check the drive’s health status.

If the drive has physical damage, stop using it immediately and consult a professional data recovery service.

Use a Linux Live USB to Access the RAW Drive

Linux can sometimes read RAW drives that Windows cannot. This is a useful alternative when external hard drive shows raw file system.

1. Create a bootable Linux USB (e.g., Ubuntu).
2. Boot from the USB and select Try Ubuntu.
3. Open Disks or GParted to view the external drive.
4. If the drive appears, mount it and copy files to another drive.
5. After data recovery, you can format the drive using Linux tools.

Linux is often more forgiving with file system errors and can be a lifesaver when external hard drive shows raw file system.

Prevent Future RAW Errors with Safe Ejection

Prevention is better than cure. Regular safe practices reduce the risk of external hard drive shows raw file system in the future.

1. Always use Safely Remove Hardware before unplugging the drive.
2. Use a surge protector to prevent power surges.
3. Keep drives in a stable, cool environment.
4. Regularly back up important data to multiple locations.
5. Test drive health periodically with CrystalDiskInfo.

For comprehensive system protection, explore our clear cache guide to optimize your system performance.

Advanced Technical Fixes

For expert users, these advanced methods go beyond standard procedures.

Hex Editing the Boot Sector

Using a hex editor like HxD, you can manually inspect and repair the boot sector of a RAW drive. This requires deep knowledge of the file system structure (NTFS or FAT32) and should only be attempted with a full disk backup.

Use DISM to Repair System Image

If the RAW issue is caused by system file corruption, run DISM /Online /Cleanup-Image /RestoreHealth to repair the Windows image. This can resolve underlying issues that cause external hard drive shows raw file system.

Professional Data Recovery Services

If all methods fail and the data is critical, consider professional recovery services. They have specialized tools and cleanroom environments to recover data from physically damaged drives.

For additional Windows recovery techniques, see our guide on external hard drive not showing in Windows 11 for related disk detection issues.

Conclusion

When your external hard drive shows raw file system, start with CHKDSK and TestDisk before attempting data recovery or formatting. Most RAW issues are repairable without data loss.

The success of each method depends on whether the issue is logical corruption or physical damage. Typically, TestDisk or third‑party recovery software offers the highest success rate for the external hard drive shows raw file system scenario.

If you encounter persistent issues, consider professional data recovery services. Regular safe ejection and backups are the best defense against RAW errors.

For additional Windows support, explore our Windows 11 troubleshooting hub to address other system issues.

Related Guides

• Windows 11 Troubleshooting Hub
• External Hard Drive Not Showing in Windows 11
• Fix Windows 11 Disk Usage 100%
• Fix Windows 11 Running Slow
• Fix Windows 11 Blue Screen of Death
• Recover Deleted Photos from Windows 11
• How to Clear Cache
• Fix Windows 11 File Explorer Not Responding

Frequently Asked Questions

What does it mean when external hard drive shows raw file system?

It means Windows cannot recognize the file system structure on the drive. The drive appears as RAW in Disk Management instead of NTFS, FAT32, or exFAT. This indicates corruption or damage to the file system metadata.

Can I fix a RAW external hard drive without losing data?

Yes, in many cases. Use CHKDSK to attempt repair, TestDisk to rebuild the partition table, or third‑party recovery software to recover data first. Do not format the drive before recovering your files.

How do I recover data from a RAW external hard drive?

Use data recovery software like EaseUS Data Recovery Wizard, Recuva, or Stellar Data Recovery. These tools scan the RAW drive and recover files without needing a file system. Save recovered files to a different drive.

Will formatting a RAW drive fix the issue?

Yes, formatting will restore a working file system, but it will erase all data. Only format after you have recovered your important files using data recovery software.

Why did my external hard drive suddenly become RAW?

Common reasons include improper ejection, power surges during data transfer, file system corruption, bad sectors, virus attacks, or physical damage to the drive.

Can CHKDSK fix a RAW external hard drive?

Sometimes. Run chkdsk X: /f from Command Prompt. If the file system corruption is minor, CHKDSK may repair it. If CHKDSK fails with “The type of the file system is RAW,” use TestDisk or recovery software instead.

How do I use TestDisk to fix a RAW drive?

Download TestDisk, run it as Administrator, select your drive, choose the partition table type, select Analyse, then Quick Search. If partitions are found, verify with the P key and write the new partition table.

Is it safe to use third-party recovery software on a RAW drive?

Yes, if you use reputable tools like EaseUS, Recuva, or Stellar. Always download from official websites and avoid unknown or freeware tools that may contain malware.

What should I do if my RAW drive is making clicking noises?

Stop using the drive immediately. Clicking or grinding noises indicate physical hardware failure. Do not attempt DIY recovery—contact a professional data recovery service to avoid further damage.

How can I prevent external hard drive from becoming RAW in the future?

Always use Safely Remove Hardware before unplugging, use a surge protector, keep the drive in a stable environment, and regularly back up your data to multiple locations.

Editorial Team