Auto Format USB "stick" why?

[admin]

From our tests and user feedback, VHD(X)-based Windows To Go has best compatibility when using non-certified drives (such as USB flash drive) to create Windows To Go workspace. So if you use a non-certified drive to create Windows To Go, WinToUSB will create a VHD(X)-based Windows To Go, if you use a certified drives or a USB hard drive to create Windows To Go workspace, then you can install Windows directly onto a USB drive.