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I have a Seagate 2TB Expansion desktop External HDD, which I have created 4 partitions, 3 of the 4 partitions are used up. Thinking that it will be cool to have an OS on the External. So I want to install the Windows 10 OS on this external HDD. But every time when I tried to installing Windows 10 straight onto the external disk, I get an error message saying that windows cannot be installed on a USB drive or IEE 1394. I was just wondering that if it is possible to install Windows on external hard drive. If so how can I get the Windows 10 OS installed?
Have you ever imagined that to use your own Windows 10 OS wherever you go? As you likely know, while one can install Windows on an external hard drive, one can’t install the same to an external hard drive with default settings. Actually, install Windows on external hard drive is not an easy task for average users. At most times, Windows recognizes and displays the USB hard drive in the installation screen, it doesn’t allow you install Windows on the same. When you attempt to install Windows on external drive, you get "Windows cannot be installed to this disk" error. But don’t worry! Here you can find the complete solution about how to install Windows 10 on external hard drive.
Step1. Format the external hard drive with NTFS and connect it to your computer. Click Start button and input "CMD" in the search box, and then click "cmd.exe" to launch the Windows PowerShell prompt. Once the Command prompt window pops up, input "diskpart".
Step2. Input the command line "disk list" then press Enter button, after that all the drives of the host computer will be listed. As you can see in the following picture, Disk 1 is the destination external hard drive for WTG in this example.
Step3. Enter the command lines in the picture below. This will clean the partition first, then a primary partition will be created. After that, the rest of the command lines will format the external hard drive and activate the partition on it. The last step is to assign the drive letter, here we choose E as the drive letter.
Step4. Open "Dism.exe" to extract the install.wim file from drive F and move it to E drive (the destination USB hard drive), please refer to the command line in the picture below.
Step5. Enter the final command line ”bcdboot e:\\windows /s e: /f ALL” to ensure the USB hard drive bootable. Here ends the whole process.