iPod Classic Features
First Generation - 5GB and 10GB, scroll wheel
Second Generation - 10GB and 20GB, touch wheel
Third Generation - 10GB, 15GB, 20GB, 30GB, 40GB
Fourth Generation - 20GB, 40GB, click wheel, color screen, view photos
Fifth Generation - 30GB, 60GB, 80 GB, black and white, video playback
Sixth Generation - 80GB, 160GB, silver replaced 5th Gen white
5GB holds 1,200 songs
10GB holds 2,400 songs
15GB holds 3,600 songs
20GB holds 4,800 songs
30GB holds 7,200 songs
40GB holds 9,600 songs
60GB holds 14,400 songs
80GB holds 20,000 songs, 25,000 photos, 100 hrs of video,
160GB holds 40,000 songs, 50,000 photos, 200 hrs of video
