Windows 10 setup does not support configuration of or installation to disks through a USB or IEEE 1394 port, so the easiest way to install Windows 10 onto a USB External Hard Drive is through a program called WinToUSB.\r<br>\r<br>Steps:\r<br>1) Plug in your USB External Hard Drive and format NTFS\r<br>2) Download Windows 10 ISO Media Creation tool and WinToUSB\r<br>3) Use Windows setup to download Windows.iso\r<br>4) Install WinToUSB and deploy Windows.iso onto your USB External Hard Drive\r<br>5) Restart your computer and press F2 to get into BIOS\r<br>6) In BIOS, go to the Boot tab and see if you have a Legacy Support and Legacy First option. Put these two on. Skip otherwise.\r<br>7) Restarting your computer, press F12 to get into Boot Manager. Select your USB External Hard Drive.\r<br>8) Finish setting up Windows 10 on your USB External Hard Drive.\r<br>\r<br>I am using a Samsung T3 Portable SSD - 500GB - USB 3.1 External SSD:\r<br>\r<br>\r<br>Windows 10 ISO download link:\r<br>\r<br>\r<br>WinToUSB:\r<br>\r<br>\r<br>Outro song (Mega Man 3 NES): \r<br>►Twitter: \r<br>►Blog: