This is another interesting HDD (20 GB), early 2000s. It's branded a "Fireball" and thus, possibly, is a relabelled Quantum design. What is interesting about this one is that it has only one head. This is very rare in HDDs because normally you can use both sides of the platter to increase your capacity. The head in this case sits right under the platter which has no head on top. When the platter is put in, the head is hidden underneath.