iPod 7th generation 32 gb

There's no simple answer to that. Among other things, it depends on the Bit Rate of the songs.

If you're asking because you are thinking of buying a 32GB iPod, the best thing to do is look at how large your music Library is. You can do that by looking in iTunes Library, at the Status Bar, which is shown at the bottom of the Songs view.

Notice the 159.3GB figure on the Status Bar. That's the size of my Library. Just make sure that you have not excluded songs. In other words, make sure you have selected all genres, all artists and all albums as shown in the screenshot above. If the Status Bar is not displayed, click on View/Show Status Bar in the top bar menu.

You will not be able to put as much music as 32GB onto the iPod, even if there were no apps on it, so assume the maximum to be about 28GB at the most. If your Library is larger than the space on a 32GB iPod, one option (rather than buying the larger capacity iPod) is to create Smart Playlists that automatically add and remove songs every time you Sync the iPod with iTunes (according to rules you set). That way, you remove songs from the iPod to free up space for other songs. (I can be more specific about how this works, if you ask.)

Another option is to automatically add songs to the iPod at a lower Bit Rate than in your Library. For example, if you have songs at 256Kbps or in a VBR format (Variable Bit Rate, see below), you can set the Sync option to add them to the iPod at 128Kbps, while keeping them at the better quality in your iTunes Library.

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The main reason that it's not a simple answer to your question is that the size of a song file will depend on the Bit Rate (as previously mentioned), but that in turn, depends upon the following:

• music purchased in digital form (from the iTunes Store, Amazon etc.) used to be sold in 128Kbps files, but is now commonly sold as 256KBps files, which means file size is larger
• music that you import from CD can be in the Bit Rate you choose. (The lowest recommended for music is 128Kbps)
• the Bit Rate of music from other sources could be anything. You would have to check each song

File size examples for a four minute song in my library (the minimum is one song, the maximum is another song):

• Apple's AAC format at 128Kbps - minimum is 2.9MB and maximum is 4.6MB
• Apple's AAC format at 256Kbps - minimum is 7.5MB and maximum is 8.8MB
• MP3 format at 128Kbps - minimum is 3.7MB and maximum is 3.8MB
• MP3 format at 256KBps - minimum is 7.5MB and maximum is 8.1MB
• MP3 in VBR (variable Bit Rate) - a song chosen at random is at 320Kbps and is 9.4MB

The more MB per song, the more space it uses up on an iPod. You will have to make your own calculations and decisions based on this.