Create a New Virtual Hard Drive

• 1). Launch Oracle VM VirtualBox. Right-click the virtual machine attached to the virtual hard drive that you want to expand, and select "Settings."
  
  
• 2). Click to select the "Storage" heading on the left side of the menu.
  
  
• 3). Click the icon that looks like a spindle of discs with a green plus sign next to "IDE Controller." When you over the mouse pointer over the correct icon, VirtualBox displays the words "Add Hard Disk."
  
  
• 4). Click the "Create New Disk" button.
  
  
• 5). Select the "VDI (VirtualBox Disk Image" radio button and click "Next."
  
  
• 6). Click the "Dynamically Allocated" radio button and then click "Next."
  
  
• 7). Click the folder button in the upper-right corner of the window and select the location for the new virtual hard drive image. The location should be the same as that of the virtual machine's current virtual hard drive.
  
  
• 8). Drag the slider at the bottom of the window to select the desired size of the new virtual hard drive, and then click "Next."
  
  
• 9). Click the "Create" button.
  
  
• 10
  
  Click the original virtual hard drive, and then click the "Remove Attachment" button at the bottom of the window.
  
  
• 11
  
  Click the new virtual hard drive. Click the "Hard Disk" drop-down in the upper-right corner of the window and select "IDE Primary Master."
  
  
• 12
  
  Click "OK."
  
  

Clone the Original Virtual Hard Drive

• 1). Open the Start menu and click "Computer." Open the "C:" hard drive, and then open the "Program Files," "Oracle" and "VirtualBox" folders.
  
  
• 2). Click the address bar at the top of the Windows Explorer window. Type "cmd" and press "Enter" to open a command prompt window starting in the present location.
  
  
• 3). Type the following command:
  
  vboxmanage clonehd "full path to old virtual hard drive" "full path to new virtual hard drive" --existing
  
  Note that you must type two "-" symbols before the word "existing." A valid example of this command follows:
  
  vboxmanage clonehd "C:\Virtual Machines\Disk1.vdi" "C:\Virtual Machines\Disk2.vdi" --existing
  
  
• 4). Press "Enter." Upon completing the hard drive clone operation, the utility displays the message "Clone hard disk created in format VDI." Close the Command Prompt window.
  
  
• 5). Double-click the virtual machine in VirtualBox to turn it on.