How to add additional drive in running Oracle Virtual Box

                                       
Power off VM in which drive need to be added.

Go to settings -->Storage

Click on Add disk icon

Click Next

Additional Hard drive is added

Open the disk management in VM machine in which the hard drive is added 

Click Ok 

Unallocated space will be available .Format and create simple volume and make use of the added hard drive

Share Files & Folders Between Your Host Machine and VirtualBox

                          Share Files & Folders Between Your Host Machine and Virtual Box

Open my computer in VM machine

Run the Vboxwindowsadditions x86 or x64 depends on your operating system

Click Next

Click Finish and reboot VM machine

After log in to the machine go to Devices-->Shared Folders

Click Add icon 

Choose the folder which is shared on the host machine

Click Make permanent

Click Ok

Go to Map Network drive on the VM machine

Browse and select the same folder

Click Finish

Now folder is shared between host machine and virtual box