The time will come when there’s a need to increase the Virtual disk size. These are the steps (to increase existing size of 10GB to 20GB):
1. Close the VM VirtualBox Manager.
2. On command prompt, go to the VirtualBox directory & issue command VBoxManage modifyhd “d:\vm\xp.vdi” --resize 20480
d:\vm\xp.vdi is the location of the vdi file. The location can also be found under SETTINGS – STORAGE.
20480 is the size in MB. In the case above, 20GB x 1024MB = 20480MB
The progress will be shown. Resize is completed at 100%
4. Boot up the virtual machine.
5. Final step is to Increase the partition size. My favorite is EaseUS Partition Master Free Edition. It’s simple & easy to us. Best of all, it’s free.