About 

It is a usb drive encased in Lego, made to resemble a robot. It is constructed from Lego and an imation USB drive (128MB), and partially held together by some blutack.

This is a picture of the USB drive I used:

 

The USB drive was very easy to take apart. Once the plastic casing is removed, thats it. Then an enclosure was built around it, using a piece of rubber band and some blutack to hold it inside and stop it from sliding out of the case. It didn't start off meaning to resemble a robot, it is simply what I ended up with :-)

Pictures

Front view:

 Side view:

Back view:

Operation view:

Notice the white disk icon on the screen, that is the USB drive as it shows up on OS X Tiger.