I am assuming these screenshots are from the Mac version of iTunes. Just wondering why it gives the amount of videos, songs etc., instead of the Gb size like windows does? Can you choose which one displays?
This should work in Windows as well, Just click anywhere on the colored dots, name area and it would switch.
Also clicking on the grey status bar below wile in the Music/Movies etc tab will give you more information.


and if you click your phone number, serial number or software version will show you more info regarding your iPhone/iPad/iPod

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