(10-28-2023, 12:04 PM)Steve2926 Wrote: Supported vDisk Format
Fixed size vhd (vhdx is not supported)
Fixed size vdi
Raw Disk Image
So are you using a FIXED SIZE VHD or VDI?
https://ventoy.net/en/plugin_vtoyboot.html
In order to make the vhd/vdi file bootable in both Legacy BIOS mode and UEFI mode.
You must set VirtualBox to UEFI mode before install OS !!!
You will need to be more precise on exactly what you are doing.
https://youtu.be/uBjpJl5nMGQ
If you had read my post properly you would find that every question you asked was answered in my post.