Your i Tunes library is a set of commands that the application uses to find where the song or video that you want to use is located.
The library is thus a list of references to locations on either your hard drive or another computer (if you are part of a local network). Whether you are creating an i Tunes library from one computer or various computers in a network, you likely do not have all of your music and video files in one location.
There are a number of options for how you can organize your library. When you install i Tunes, you will have the option to add music and video files from your computer or network to i Tunes.
In i Tunes 9 and later, content is stored in the i Tunes Media folder.i Tunes software may be used to reproduce materials.
If you choose to consolidate your i Tunes library, the result will be that you will create copies of all of the files in your library into a single folder (usually "i Tunes music") on the hard drive of the computer from which you are running i Tunes.
It leaves the file in its original location as well.
Luckily, there are a number of methods--some free, some with small costs--that can make this process easier.
Home Sharing, available in i Tunes 9 and higher, allows i Tunes libraries on the same network to copy items back and forth.
As that happens, you'll need to know how to consolidate i Tunes libraries from multiple machines into a single, large i Tunes library on the new computer.