FIX: Unallocated hard drive without losing data [Windows 10]

FIX: Unallocated hard drive without losing data [Windows 10]

Have you ever noticed your external hard drive not appearing in the Devices and Drives section of This PC (My Computer in earlier Windows editions)?

The first thing you should do here is to reconnect the drive. If it’s still missing from the page, then troubleshooting begins.

Read More: how to fix unallocated hard drive without losing data windows 10

The Device Manager can confirm that the device is connected and working well. However, you see that the drive is also unallocated.

Data can’t be written to unallocated space on your hard drive.

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Several things can cause the unallocated hard drive issue, but before figuring out the cause, you need to learn how to fix an unallocated hard drive without losing data.

How do I fix unallocated hard drive without losing data in Windows 10?

1. Use Command Prompt

Create a new volume using commands

cmd-diskpart-how-to-fix-unallocated-hard-drive-without-losing-data-windows-10

  1. Press the Windows key and search for cmd.
  2. Click on Command Prompt from the search results.
  3. In the Command Prompt window, enter diskpart and hit Enter.
  4. Type in list volume and press Enter.
  5. Choose your drive letter using the following command: select volume z. NOTE: Replace z in the above command with your drive letter.
  6. Type the following commands and hit ENTER after every line:
    1. delete volume
    2. list volume
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At this point, DiskPart should create a new volume.

Note: In case the above-mentioned steps fail, follow the steps described below to create the volume manually.

Create a new volume manually

  1. Enter the following commands in Command Prompt and press Enter after every line to run it:
    1. select volume z (change the z in this command to your drive letter).
    2. delete volume
    3. delete volume override
  2. Press the Windows key and search for disk management.
  3. Select Create and format hard disk partitions from the search results.
  4. Right-click on the unallocated hard drive.
  5. Select New Simple Volume and click Next.
  6. Set the Simple volume size in MB and hit the Next
  7. Select Format this volume with the following settings.
  8. Set the File system to NTFS, Allocation unit size to Default, and name the Volume label.
  9. Mark the Perform a quick format checkbox and hit Next.
  10. Click on the Finish button.

2. Use CHKDSK

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chkdsk-command-how-to-fix-unallocated-hard-drive-without-losing-data-windows-10

  1. Click on the Start Menu button and search for cmd.
  2. Right-click on Command Prompt and choose to Run as an administrator.
  3. In the Command Prompt window, input chkdsk z: /f/r/x and hit ENTER.

Note: In the command above, remember to change z to the correct drive letter of the unallocated hard drive. /f repairs drive errors, /r recovers data in bad sectors, and /x unmounts the drive to begin the process.

3. Update your hard-drive driver

how-to-fix-unallocated-hard-drive-without-losing-data-windows-10-disk-management

  1. Press the Windows key + R
  2. Type thegoneapp.com and hit OK.
  3. Expand Disk drives.
  4. Right-click on the unallocated hard drive and select Update Driver Software.
  5. Click on Search automatically for updated driver software and follow the on-screen instructions.
  6. Restart your computer.
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If you still don’t see your drive after the reboot, return to these steps and start all over. In Step 4, select Uninstall instead of Update Driver Software.

Your driver will be reinstalled after you restart Windows 10. This is another useful tip when learning how to fix an unallocated hard drive without losing data in Windows 10.

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