How to resize Virtual Box .vdi Disk Size on Windows XP SP3

To increase open command promt and do the following.

cd C:\Program Files\Oracle\VirtualBox

VBoxManage list hdds

Find your .vdi path and run:

VBoxManage modifyhd “C:\VDI PATH\XX\XX.vdi” –resize 40960

And open your virtual machine. Windows XP is not supporting resize of the current disk in the disk management. Find a third party tool like partition magic. And increase the size of disk with unallocated partition.