If needs, pre-defined disk size could be extended or shrank by “VirtualBox” embedded command
- Check the location of the disk for VirtualBox Image
- Remove snapshot of the disk
- Go to terminal mode
- Run command <megabyte단위, i.e. : 100GByte>”VBoxManage modifymedium disk “Ubuntu 16.04 1.vdi” –resize 100000″
i.e. : Windows : D:\VirtualBox\Win10>”c:\Program Files\Oracle\VirtualBox\VBoxManage.exe” modifymedium disk Win10.vdi –resize 81920
0%…10%…20%…30%…40%…50%…60%…70%…80%…90%…100%
[참고 사이트] https://www.nemonein.xyz/2019/11/2673/