VirtualBox allows sharing VDI images between PCs.
Move VirtualBox .vdi to another PC
On “new” PC, install the current VirtualBox software. On Ubuntu, this can be accomplished by:
apt install virtualbox virtualbox-ext-pack virtualbox-guest-additions-iso
On “new” PC, install VirtualBox Extension Pack.
plug in USB drive with VDI file to “new” PC
in VirtualBox click Machine → add, and select the
.vboxfile for the VDI.
Now you can share the same VDI between PCs. For example, share a Windows-equivalent ReactOS VirtualBox guest image between PCs.