Already zerofree the partition, cloned it... but still same error
vboxmanage modifymedium "C:\Users\CarlosPalminha\VirtualBox VMs\Xubuntu\Xubuntu.vdi" --resize 17000
0%...
Progress state: VBOX_E_NOT_SUPPORTED
VBoxManage.exe: error: Resize medium operation for this format is not implemented yet!