Determine the Windows Edition Index. The install.wim file contains multiple editions (Home, Pro, etc.).
If boot fails, try a different USB port or enable + disable Fast Boot.
Double-check that you have selected the correct drive letter in your software to avoid accidentally formatting your internal system drive. install windows 10 to external hard drive
Deployment of Windows 10 to External Storage Media: A Technical Workaround for Portable Environments
Use only for recovery tools, diagnostics, or isolated environments. Determine the Windows Edition Index
Note the index number corresponding to the desired edition (e.g., Index: 6 for Windows 10 Pro).
While this paper provides the methodology for installation, the viability of a portable Windows 10 environment is heavily dependent on hardware interface throughput. Double-check that you have selected the correct drive
This is the most critical step. Under "Image option," select "Windows To Go" instead of the standard "Standard Windows installation".
Plug your external hard drive into your PC. Ensure any important data is backed up, as this process will erase all files on the drive.
As this is a portable installation, the OS will attempt to install drivers for the host machine's hardware upon every boot into a new computer. Windows 10 is generally robust regarding driver handling; however, the installation should ideally be performed on hardware similar to the intended target machines to ensure the correct USB and Storage drivers are present in the driver store.