Microsoft officially released the Windows 10 May 2021 Update (Windows 10 21H1) May 18, 2021, which brings us some new features and functional improvements. Do you want to experience the new features of Windows 10 21H1 and worry about possible BUGs that may cause Windows 10 to crash after upgrading to Windows 10 21H1? If this is what you are worried about now, then you have come to the right place. The solution to this problem is to install Windows 10 21H1 to a USB drive and then start Windows 10 21H1 from the USB drive and experience it. In this way, Windows 10 21H1 works completely on the USB drive, so it will not damage Windows on the internal hard disk. Hasleo WinToUSB is such a software that can help you install Windows 10 to a USB drive as protable Windows 10. Below we will introduce in detail how to use Hasleo WinToUSB to install Windows 10 May 2021 Update (Windows 10 21H1) to a USB drive as portable Windows 10.
Step 1. Download Windows 10 May 2021 Update installation ISO, usually we use MediaCreationTool.exe to download Windows 10. We recommend that you go to Microsoft's official website to download the MediaCreationTool21H1.exe tool, here is the link: Download Windows 10 May 2021 Update.
Step 2. Connect the destination external hard drive or flash drive to the computer with an installed copy of WinToUSB, then run WinToUSB.
Step 3. Click the 
button, then click the 
button and select the Windows 10 May 2021 Update installation ISO file download earlier from the open dialog box.
Step 4. WinToUSB scans for and lists installable operating systems. If you see the edition of Windows you want to install, select it, then click "Next".
Step 5. Select the destination USB drive in the drop-down list. If the USB drive is not correctly recognized by WinToUSB, you need to click the 
button for the program to recognize the USB drive.
Step 6. A pop-up will appear asking you if you want to format it to continue, select the partition scheme you want to use and click "Yes" to format it. If you choose "Keep the existing partition scheme", you need to manually prepare the partitions on the USB drive before this step, and here is the user guide on how to manually prepare partitions for Windows To Go. Please note that the "Keep the existing partition scheme" option is valid only for an external disk.
Step 7. Select the system partition and boot partition from the partition list, the selected partitions will be marked as red, then click "Next".
Step 8. After clicking "Next", WinToUSB begins installing Windows.
Step 9. It takes some time to install. After installation restart the computer and change BIOS to boot from your USB drive.
Step 10. Windows 10 May 2021 Update (Windows 10 21H1) normal installation starts up and you have to complete all the installation steps. After that, you can install programs, copy files, etc.
WinToUSB is the most professional Windows 10 To Go creation tool which can help you install Windows 10 May 2021 Update (Windows 10 21H1) to a USB drive as portable Windows 10. The operation is very simple, you only need to prepare a Windows installation ISO file and a USB drive, Hasleo WinToUSB will help you complete all the remaining work.
