Ask Max: Why has iTunes stopped accessing all the songs I have received from friends?
iTunes suddenly stopped accessing all the songs I have gotten from friends' computers. Why is this? Every time I click on one of the songs, a window comes up that says the file cannot be located. This seemingly happened for no reason.
That message typically indicates that the files have been moved form the library or their original source. That source can be an external hard drive, iPod in disc mode, CD/DVD, or even a network mounted drive. To make sure your files are actually in the iTunes Library, you need to change a iTunes preference setting. Go to the "iTunes" menu and down to Preferences. In Preferences, click on the "Advanced" tab. Now mark the Checkbox for both "Keep iTunes folder organized" and "Copy files to iTunes Music folder when adding to library."
Those changes will make sure that your music shown in iTunes is actually on your computer. If you received the music files via a CD/DVD, you will need to re-add them to your iTunes library by reinserting the disk and using the "Add to Library..." item from the File menu. Then just select the disc and add all the files.