
You should see a visual confirmation that VBoxManage is working on the file. Depending on your font, it may visually appear as one long line. The quotes enclosing is necessary because the file path (and name) has spaces in it, and the Prompt would not be able to handle them without the quotes. VBoxManage modifyhd “c:\Users\Hubert\VirtualBox VMs\Accounting Clone\Accounting Windows Clone.vdi” –resize 40000 In my case, I typed (to re-size to 40 GB or 40000 MB): VBoxManage modifyhd “C:\Users\\VirtualBox VMs\\.vdi” –resize Use the modifyhd command of VBoxManage (a utility that comes with VirtualBox) as follows:

You should now be in the proper directory, and can even verify that the VBoxManage.exe app is there by typingįind the file path where your virtual machine disk file (.vdi) is (usually in C:\Users\\VirtualBox VMs\). Here are the commands to type (one per line): Go where VirtualBox is installed (typically C:\Program Files\Oracle\VirtualBox) to find the VboxManage utility (full documentation here). Open a command prompt by clicking on its icon or typing “cmd” in Start>Search.

It is equivalent to increasing the size of a physical disk, but you still need to extend the Operating System partition, as described in Step 5 onwards. But that’s not over! This new graphical user interface basically lets you skip Step 1 to Step 4 in the instructions below. Then choose the disk you want to modify, and pick a new size following by “Apply”.

It is very simple as you just go to the File menu and select it.

In more recent version of VirtualBox, you have a Virtual Media Manager that cab resize the disk for you (I spotted it in V6.x but I’m unsure as for when it was added).
