Use the Windows Deployment Image Servicing and Management (DISM) API to apply the image. This is more reliable than manual file copying.
Hasleo WinToUSB is a professional Windows To Go (WTG) creator that allows you to install and run a fully functional version of Windows on an external hard drive, USB flash drive, or Thunderbolt drive. The Utility of Portable Windows hasleo wintousb key
: It enables the creation of a Windows To Go workspace from an ISO, WIM, ESD, SWM, VHD, or VHDX image file. Use the Windows Deployment Image Servicing and Management
The feature should follow a "Wizard" style interface to guide the user step-by-step. USB flash drive