This is a great feature to have if you want to run a home server or media server from within your Virtual Machine.

What this means is that you can access your USB drives from within your VM at or near USB 3 speeds. The impending release of VirtualBox 5 is exciting because it brings USB 3 support. In this post, let us look at how to install VirtualBox Extension Pack on Linux (including Ubuntu) and Windows. VBox Extension Pack adds certain advanced features, some of which are closed-source. We have already showed you how to install VirtualBox on Ubuntu and Windows, install Guest Additions on Windows and Ubuntu, Setup Shared Folder, and Mount Shared folder on Ubuntu and Windows. Personal Use and/or Educational Use expressly exclude any use of the Product for commercial purposes or to operate, run, or act on behalf of or for the benefit of a business, organization, governmental organization, or educational institution.If you want even more features on VirtualBox than what Guest Additions offers then you will have to install VirtualBox Extension Pack. “Evaluation” means testing the Product for up to thirty (30) days after expiry of that term, you are no longer permitted to use the Product.

“Educational Use” is any use by teachers or students in an academic institution (schools, colleges and universities) as part of the institution’s educational curriculum. “Personal Use” is noncommercial use solely by the person downloading the Product from Oracle on a single Host Computer, provided that no more than one client or remote computer is connected to that Host Computer and that client or remote computer is used solely to remotely view the Guest Computer(s). Oracle grants you a personal, non-exclusive, non-transferable, limited license without fees to reproduce, install, execute, and use internally the Product on Host Computers for your Personal Use, Educational Use, or Evaluation. You should consider the license for the Extension Pack though: § 2 Grant of license. I've been using the VirtualBox packages created by AutoPkgr recipe and they deploy properly.

How to use virtualbox extension pack