To move music or your iTunes library to a new computer, first, you need to download and install the latest version of iTunes. If you’ve used iTunes on your new computer, move your media to a new folder. This will keep anything you added to your new computer separate from your old library.
Follow these steps courtesy of Apple.com to copy all of your media files, including the library file that holds all your playlists and other settings, to your new computer:
1. Locate the following folder on your new computer.
Mac: Choose Go > Home from the Finder menu bar. Double click the Music folder.
Windows XP: Navigate to \Documents and Settings\username\My Documents\My Music.
Windows Vista: Navigate to \Users\username\Music\iTunes.
Windows 7 and Windows 8: Navigate to \Users\username\My Music\iTunes.
2. Drag the iTunes folder location onto the desktop.
Mac: From the Music folder to the Desktop
Windows: From the My Music folder to the Desktop
3. Locate the external drive on your new computer:
Mac: On the desktop.
Windows: In My Computer or Computer.
4. Double-click the external drive icon to open it.
5. Drag the iTunes folder from your external drive to the Music folder (Mac) or My Music Folder (Windows) on your new computer.
Mac: From the external drive to the Music folder
Windows: From the external drive to the Music library
The transfer might take a while if you have a lot of content.
6. Open iTunes.
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