Moving your iTunes Music folder

If your hard drive is nearly full after loading all your music into iTunes, or if you just want to move all those music files to another hard drive on your system, here's a way to make the move while retaining all your playlists, ratings, and play history.
First make sure that the "Keep iTunes Music folder organized" option is checked in iTunes Preferences:
1. Mac users: From the iTunes menu, choose Preferences.
Windows users: On the Edit menu, click Preferences.
2. In the resulting dialog, click the Advanced button and then click the General tab.
3. Select the "Keep iTunes Music folder organized" checkbox.
4. Click OK.

Once you've done that, follow the next set of steps to change your iTunes Music library location to the new drive and then consolidate your library to the new location. This not only copies your audio files over, it also retains your ratings and playlists. Note: If you move your music library to an external hard drive, you will need to have that drive connected to access your files. No matter what, it's always a good idea to have a backup of the media you have in iTunes.
1. Open iTunes.
2. From the iTunes menu, choose Preferences (In Windows, from the Edit menu, choose Preferences).
3. Click the Advanced button in the Preferences window and then click the General tab.
4. Click the Change button in the Advanced pane.
5. In the Change Music Folder Location window that appears, navigate to the location where you would like your new Music folder to be created. Note: By default, your iTunes Music folder is a folder named "iTunes Music" in ~/Music/iTunes/ where the tilde "~" represents your home directory. In Windows, the default location is:
\Documents and Settings\username\My Documents\My Music\iTunes
6. Click the New Folder button in the Change Music Folder Location window.
7. In the New Folder window that appears, enter the name of the new iTunes Music folder.
8. Click Create.
9. Click Choose in the Change Music Folder Location window.
10. Click OK in the Advanced window.
11. From the Advanced menu, choose Consolidate Library. A message appears that says: "Consolidating your library will copy all of your music into the iTunes Music folder. This cannot be undone."
12. Click Consolidate. Important: This action copies all of your music files to the new location. There must be enough hard disk space available to copy all of your music files.13. After the folder has been copied, locate your original iTunes Music folder, and drag it to the Trash or Recycle Bin. Note: Don't remove the iTunes library files that may be in the same location as the iTunes Music folder.
14. Empty the Trash or Recycle Bin.