This is a little help for those who want to know, how to install and sucessfully use the usb in Windows XP, Vista or Seven in VirtualBox. For Linux Mint Debian Edition.

I've tried with the 3 of them. In a laptop Lenovo T400 the data is in "my hardware" in my profile.

1.- Install VirtualBox from the Website (DO NOT INSTALL from the Repos)

Here: http://www.virtualbox.org/wiki/Linux_Downloads

Select Debian: Debian 6.0 ("Squeeze") i386. from the list.

Add the following line according to your distribution to your /etc/apt/sources.list:

deb http://download.virtualbox.org/virtualbox/debian squeeze non-free

How to do that:

Open a "Root Terminal" (The terminal is a little icon like a TV screen)
Open Mint Menu and under Accessories it's a "Terminal" and a "Root Terminal"

learn more With The 5-Minute Essential Shell Tutorial from justin.

Choose "Root Terminal" and a white screen with a message is going to pop up!

Inside the terminal you are going to type in what we need to install, VirtualBox.

First

sudo gedit /etc/apt/sources.list

It's going to open a text document and you are going to paste the line:

deb http://download.virtualbox.org/virtualbox/debian squeeze non-free

Save and quit.

That is going to add the sources from VirtualBox Non-free package.
Which means you'll have a different package from the one you see 
in the "Software Center".

After that we go back to the terminal because we have to download and install 
the Oracle Public Key, we just have to type:

wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -


Please Be carefull to copy/paste ALL the code and hit enter, 
you shoud see a message displaying an "OK"

To install VirtualBox, do:

sudo apt-get update

This Command it's going update your sources, 
remember we add the sources from VirtualBox? Well you'll have another "source"
Where you can download another version of VirtualBox.

Other Command to download the latest version 
from the sources that you already update:

sudo apt-get install virtualbox-4.1

This Command asks to install VirtualBox is going to show something like this:

 Click "y" and hit enter. If you receive a message saying that you need

to type an "install command" (don't remember which one)

just copy the command that is displayed, hit enter,

and type again the command given above.

After that:

Follow the steps from here.

If doesn't works:

Edit the file "fstab" follow steps from here.

Sorry if the tone of this tutorial is for dummies, but I am new in Linux and i'm trying to help

the ones that don't have a clue about computers.

Let a message if you have something to add to this tutorial, Remember that this tutorials is to help the community and Linux to evolve; this could lead to faster development by identifying faster what is not well seen or done. Peace!!