Select the target USB flash drive you prepared in the drop-down list.
You can select the edition of Windows you want to install and click Next to continue.
Then all installable operating systems in the Windows 10 installation ISO can be scanned by WinToUSB and listed here. And click on the folder icon button at the top of right corner to select the Windows 10 installation ISO file from the pop-up window. Click on that Disc graphic icon from the left task bar. Then run this software and make sure the USB drive is connected and successfully recognized. Download and install this free software from its website.
How to Create a Portable Windows 10 USB Drive
When you boot various computers from the USB drive, you may encounter some driver problems.
Please keep reading the following guidance to create a portable Windows 10 with WinToUSB How to Create a Portable Windows 10 USB Drive Create a Portable Windows 10 USB Drive with WinToUSB Note: some functions are not available in free WinToUSB version, more detailed edition comparisons you can visit its website. That means you can migrate the contents of a Windows PE image to a USB drive and boot your computer from this USB drive. You can use WinToUSB to create a bootable Windows PE USB flash drive. Just need a few simple steps, you can create a Windows bootable USB flash drive to install Windows both on traditional BIOS and UEFI computers by using this USB flash drive. You can use a Windows 10/8/7/vista/2016/2012/2008 installation ISO image file to create a Windows installation USB drive. Windows installation USB creator is another powerful feature of WinToUSB.