can u explain me about storage?

WHY IS THERE SO MUCH DIFFERENCE IN IPOD STORAGE CAPACITY?

I am not really sure about this but i believe that more storage means that you can put many things inside.

It works like a minicomputer. Before, they could fit maybe 128mb on a computer hard drive but now they can fit 1 terabite in the same space. Technology is getting better and iPods need to keep up by adding more space.

Just want to add something, spaces is something necessary because ipod have so many applications and it do increase everyday