$ VBoxManage modifyhd Windows_7_1GB.vdi -resize 20480 resize the disk image file From the docs This command 'currently works only for VDI and VHD formats, and only for the dynamically allocated variants, and can only be used to expand (not shrink) the capacity'.Disk 1) and click 'New Simple Volume.', run the wizard Open Computer Management by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Security, clicking Administrative Tools, and then double-clicking Computer Management.‌ Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.Storage -> SATA Controller -> Add Hard Disk.In the Oracle VM VirtualBox Manager, click 'Settings'.click 'Run VBoxWindowsAdditions.exe', click on stuff to install the stuff.Info: Install instructions: Install Guest Addtions to allow sharing between guest/host, better screen resolution Windows 7 Professional 32-bit took 7.3GB after installing. I chose 1GB ram and 30GB hdd for the guest to run MS SQL Server Management Studio.

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