If there are not to many songs with red exclammation marks
To fix this for just a couple of songs, you have to tell iTunes where the song has moved to. Do this by:
- Double-clicking the song, or single clicking the exclamation point
- A pop-up errors should appear that reads "The song could not be used because the original file could not be found." It should offer you the option to find the file. Choose that.
- Browse through your hard drive until you locate the missing song and iTunes adds it back.
If you've correctly located the song, the exclamation point should disappear and it should play without problem.
If the exclamation point has appeared for many of your songs, finding each one may take more time than you want to spend. In this case, the problem can often be solved by organizing/consolidating your iTunes library (which word is used depends on your version of iTunes).
To do this, go to the File menu, choose Library, and then choose Organize (or consolidate) Library. In most cases, if the song is still on your hard drive, this can fix the problem.
alt
This may sound drastic but you know all your songs are on the external hard drive and you can access that from your itunes..
1) Delete all tracks from the itunes and move to trash
2) Copy the itunes Folder and all sub Folders on external drive.
3) Paste into the username/ Music folder
that will copy the whole itunes including playlists onto your loval drive.
iTunes will then work normally