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Usually, it’s located in VirtualBox folder located under Documents. Step 3: Next, find out the exact location of the virtual hard drive that you wish to increase. In the above command, replace “C” with your Windows installation drive’s drive letter. Step 2: In the Command Prompt, type the following command and press enter key. Alternatively, you can type CMD in Start menu search box (Windows 7/Vista) or in Start screen (Windows 8 and above) and press enter key to open Command Prompt. To do this, open Run dialog box by simultaneously pressing Windows logo and R keys, type CMD in the box, and then press Enter key.
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