PS D:\Program Files\Oracle\VirtualBox> ./VBoxManage modifymedium disk 'D:\Users\leeyi\VirtualBox VMs\ubuntu17.10.1\ubuntu17.10.1n-disk001.vdi' --resize 102400
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
PS D:\Program Files\Oracle\VirtualBox>