Expand VHDX without Hyper-V

Look up the VHDX filename including the path.

In admin cmd

1. diskpart
2. select vdisk file="E:\EXAMPLE.vhdx"
3. expand vdisk maximum=40000
4. exit

Now mount the VHDX in Disk Management to expand the partition fully, remember to detach the VHDX.

The value 40000 will give 40GB