How to Install Windows 11 on External SSD or USB Storage

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By Viraj

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Installing Windows on an external SSD or USB storage helps when you want to carry it in your pocket. Also, it becomes convenient to try out new things with a plug & play setup.

Now, Windows installation on external storage is not as straightforward as a traditional way. Normally, for a clean installation, we boot up the installation disc from BIOS and install windows from there. But, if you try to install Windows on an external SSD, you’ll get a message like this:

Windows can not be installed on this disk. Setup does not support configuration of or installation disks connected through a USB or IEEE 1394 port.

Windows Cannot be installed on External Disk/SSD Error Message
Windows Cannot be installed on External Disk/SSD Error Message

When I was trying to install Windows 11 on my Samsung T5 SSD for the first time, I got the same message as above. I started searching for the workaround and came across a tool called WinToUSB.

WinToUSB is an amazing tool that copies data from Windows 11/10 ISO to your external SSD and makes it bootable. Thus, cutting off all the hassles for you to manually install a clean copy of Windows.

Pros & Cons

  • Portability: Useful when you just want to have a plug&play setup.
  • You can test Windows Beta/Developers updates and do whatever you want, without having to worry about the damage it may cause.
  • Dual-booting: You can run 2 operating systems alongside each other.
  • Licensing problems might occur when you move the USB SSD between different machines.
  • It’s not as reliable as having Windows installed on an internal SSD. It can probably result in the corruption of data.
  • Speed can be an issue if you use any other USB storage than SSD.
 Do note that this guide involves the formatting of the external storage disk on which you are going to install the Windows. I strongly recommend that you back up all the data before starting with this procedure. 

Steps to Install Windows on External SSD/Storage

Step 1 – Download the latest Windows 11 ISO.

Step 2 – Download WinToUSB software.

Step 3 – Open WinToUSB and locate the Windows 11 ISO File. Select whichever Windows version you want to install. For this tutorial, I have selected Windows 11 Pro.

WinToUSB Windows 11 ISO Selection
WinToUSB Windows 11 ISO Selection

Step 4 – Select GPT for UEFI as a partition scheme and click on the yes button.

Partition Scheme Selection
Partition Scheme Selection

Step 5 – Wait while WindowsToUSB formats the external storage disk.

Formatting SSD
Formatting SSD

Step 6 – Keep Installation mode as Legacy. If you want to enable BitLocker, then tick Enable BitLocker and enter the password for BitLocker encryption. Click Next.

Enable/Disable BitLocker
Enable/Disable BitLocker

Step 7 – Wait while WinToUSB copies data from Windows ISO to your SSD and makes it bootable.

Windows 11 getting copied to SSD
Windows 11 getting copied to SSD

Step 8 – Once WinToUSB finishes copying Windows, it’s time to boot the disk. For that, shut down your computer and boot into the BIOS. Generally, BIOS can be brought up by pressing the F2 key on most of the systems, but it can vary with your motherboard.

Step 9 – In BIOS, search for the boot priority settings. Change the boot order by moving your external USB storage / SSD to the first spot. Save the configuration and restart the PC.

Well, that’s it, folks! When the system boots up, a warm welcome from Windows shall appear on the screen.

In case of any issues, do drop a comment below and I’ll be happy to answer your queries.

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