How to expand the capacity of VirtualBox's virtual disk vdi file (graphic tutorial)

Find the installation directory of VirtualBox. There is an executable file in the directory that can be used to expand the capacity: VBoxManage.exe

Start the command window cmd in this directory

My vdi is: Windows 8.1.vdi. I installed it using the command VBoxManage modifyhd Windows 8.1.vdi --resize 25000 to expand the capacity. However, the result is:

The parameter is illegal because my vdi file name is: Windows 8.1.vdi. If you look closely, you can see that there is a space in the middle. However, in reality, I named it like this when I installed the Windows system, so it is not feasible to call the above command. So I tried to remove the space in the middle: VBoxManage modifyhd Windows8.1.vdi --resize 25000. I guess there is an error, but I provide a solution:

Combined with the error, I saw the UUID of Windows 8.1.vdi. Looking at the command format below, we can use UUID to specify our vdi file:

Open VirtualBox and you can see that the capacity has indeed been expanded:

However, when I checked Windows 8.1 in the virtual machine, the capacity of the C: drive was not expanded.

At this time, we still need to complete the last task: use GParted to adjust the partitions of the virtual machine. Download GParted: http://gparted.sourceforge.net/download.php

Use the virtual machine to start this iso file:

After startup, select all defaults (according to the Internet), and press Enter

The last card cannot be started here:

The problem occurred. I restarted several times and it was the same. Finally, I got rid of the online statement: all the startup options were default. On the homepage of the last restart, I selected the second option:

The changes are mainly in these two steps. The subsequent Configuring console-data, language, etc. are all default items. Then you can enter the gparted interface, select the disk to be expanded, right-click -> Resize/Move, and then drag the scroll bar to adjust the capacity.

Finally, select Apply:

Finally, shut down normally and select the original operating system:

After Windows is started, open My Computer and you can see that C: has been expanded.

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