Solved: External drive won’t mount, eject or boot
External hard drives (SSDs included) are of great use for various reasons. Having your data with you at all times is normal these days, especially on a storage which is easily accessible and has a lot of storage space.
However, Windows 10, the system which should be a top-notch service, has a lot of issues with external drives. Besides the minor problems, the users had the worst time with the mounting, ejecting, or booting from the external drive.
Because of that, we made sure to provide the appropriate solutions for these issues. If you have been looking for a solution which should fix mount/eject/boot errors, look no further than below.
How to fix external drive issues in Windows 10
- An external drive won’t mount in Windows 10
- A mounted external drive won’t eject in Windows 10
- An external drive won’t boot on Windows 10
1: External drive won’t mount in Windows 10
Mounting an external drive should be quite simple. Plug-and-play is there for ages and the system should have an easy time reading any USB-plugged external drive.
However, seemingly, some users experienced a variety of issues which, eventually, lead to the same conclusion. The system can’t recognize the external hard drive whatever they do.
Now, before we outline the possible solutions for this problem, we need you to try and mount your drive on an alternative PC. That way we’ll eliminate possible hardware issues. Hardware issues which are quite common when it comes to hard drives and USB ports.
If you’re sure that the external hard drive works on other machines but it just won’t mount on that one Windows 10 PC, follow the instructions we provided below:
- Try an alternative USB port. If your device is USB 2.0, make sure to sure the proper port.
- Reinstall the driver.
- Change USB power settings.
- In the Windows Search bar, type Power and open Power & sleep settings.
- Click on the Additional power settings.
- Click on the “Change plan settings” option beside Power plan of your choice.
- Choose “Change advanced power settings”.
- Expand USB settings > USB selective suspend setting.
- Disable this setting and confirm changes.
- Create a new volume
- Press Windows key + R to open the Rum elevated command-line.
- Type in diskmgmt.msc and run it.
- You should see a lot of unallocated space.
- Right-click on the Unallocated space and choose to create a New simple volume.
- Choose the size and confirm changes.
- Unplug external drive and plug it in again.
- Format your external hard drive (preferably in NTFS format).
2: Mounted external drive won’t eject in Windows 10
Now, this is rather peculiar. Problems with mounting a certain drive are one thing, and the reasons spectrum is broader. On the other hand, the issues one can experience with the inability to eject certain external hard drive are mostly provoked by the background processes.
Namely, some background process associated with the mounted drive prevents it from ejecting. Of course, you can unplug it/shut it down without ”safely remove” feature, but that can, consequently, lead to more complex errors and further issues.
What you’ll need to do is to follow the solutions we enlisted below and look for improvements. Hopefully, you should be able to eject the mounted drive safely, without any risks of data corruption.
- Reboot your system.
- Make sure there’s no application in use of data stored in the drive. Close all applications you’ve used to open those files and try ejecting the external mass storage again. Also, temporarily disable the antivirus.
- Eject it from the This PC.
- Open This PC/My Computer.
- Right-click on the external drive and click Eject.
- If you see the error, just continue.
- Use a third-party safely remove software.
- Troubleshoot the drive.
- Change advanced settings.
- Format your drive to NTFS format.
3: External drive won’t boot on Windows 10
Finally, one of the advantages of portable data drives is that you can create a bootable system drive and carry your system around. However, some user reports outlined the boot issues concerning the external drive. They were unable to boot to Windows 10 from the external drive, even though this worked great on the previous Windows iterations.
When you look at it, it’s quite obvious that the BIOS (UEFI) is the one to blame. However, it doesn’t mean that the BIOS is the only culprit. We enlisted all known troubleshooting steps below.
- Don’t even try with USB 3.0. Windows 10 can hardly boot from the USB 3.0/3.1 drive.
- Update BIOS.
- Disable Legacy USB in BIOS (UEFI) settings.
- Format external drive in NTFS and create a new bootable drive.
That’s a wrap-up. In case you’re aware of any alternative solutions, feel free to share them with us in the comments section below.
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