Convert to VDI format VBoxManage clonehd “box-disk1.vmdk” “clone-disk1.vdi” –format vdi
[Capacity] is the capacity VBoxManage showhdinfo clone-disk1.vdi
Change to 32GB VBoxManage modifyhd clone-disk1.vdi –resize 32768
Convert to VMDK format VBoxManage clonehd “clone-disk1.vdi” “box-disk2.vmdk” –format vmdk