Note that the following steps can also adapt to any OS in VM. 1) Windows 7 ( in VM ) 1.1) Installed Guest Additions... using method here . 1.2) go to, Devices > Shared Folders... put <folder path> and <folder name> 1.3) go to windows 7 in VM. execute net use x: \\vboxsvr\<folder name in step 2> 2) Ubuntu 12.04 ( in VM ) 2.1) Share Folder on VirtualBox 2.1.1) In VirtualBox, settings > Shared Folders > add Folder path : [on local] path: [on VM] auto-mount : unchecked ( auto-mount does not work in my case, windows 7 + (virtual)ubuntu 12.04. I could see folder in /media/sf.. but could not see files inside folder. Therefore, manual mount method is below ) permanent : check ( this will be added under "Machine Folders" section of VirtualBox) 2.2) Manual mount on ubuntu 2.2.1) mount $ mkdir ~/new $ sudo mount -t vboxsf New ~/new 2.3) Auto mount when start machine 2.3.1) If we want auto mount when start machine, add this...