How Does External Drive Towel Work Why Does The Ipod Touch Not Appear As An External Drive On The Computer?

Why does the ipod touch not appear as an external drive on the computer? - how does external drive towel work

I recently received an iPod Touch 8GB. But when I use the computer does not appear in My Computer as an external drive (like the iPod Classic)
Does that mean it can not contain data. I also have the latest version of iTunes, but not play most of my songs (mp3 format), there is a kind of disorder. But the main problem is that it seems as if an external HD, which is recognized by iTunes.