Dynamic VHDX-based Windows To Go Workspace?

[bacevs]

Is is possible and/or recommended to create a Dynamic VHDX-based Windows To Go Workspace?

I'm sorry, WinToUSB doesn't currently support creating a Dynamic VHDX based Windows To Go Workspace. Could you tell us why you need this feature? Does a fixed size Windows To Go Workspace not meet your needs?

I don't just use my portable SSD to run Windows to Go.
I also use it to transfer large files as a portable drive from work to home. 

So it would be nice if the image was dynamic to give me more space to transfer stuff on/off it when not booted into windows. 
At the moment I've created a fixed 120GB VHDX file, with windows only currently using less than half of that. Obviously windows will grow in the future, but at the moment that a big waste of space.