Al's advice is on the money. Basically you have to stash your music files somewhere safe while you get your music drive into perfect shape, emptied and squeaky clean with all the bookshelves in order. So to speak. Then you reformat the music drive and copy the files back onto it. Then if it all works, you clone your music drive to a reformatted backup drive, using SuperDuper.
Al suggests you stash your music files by copying with the OS. On a Mac, copying files with the OS is called copying in the Finder. You open a window and navigate within it until it shows a list of the files you want to copy. You open a second window which shows the destination, the place you want to copy the files to. Then you select the files in the first window and drag them to the second. The Finder will put up a progress bar to show you how long you'll have to wait till the copy is done.
The only worry I would have here is the possibility that some of the music files have been corrupted. If you have any of these, copying them is not a good idea. They need to be trashed asap. Unfortunately I don't think you can find them without a diagnostic and repair program. I use DiskWarrior. However it costs $100. I have never been sorry I paid the money but you don't have to feel the same way. You can go ahead and do your copy without it. The chances are small that there will be a file corruption problem on the disk.
Al suggests you stash your music files by copying with the OS. On a Mac, copying files with the OS is called copying in the Finder. You open a window and navigate within it until it shows a list of the files you want to copy. You open a second window which shows the destination, the place you want to copy the files to. Then you select the files in the first window and drag them to the second. The Finder will put up a progress bar to show you how long you'll have to wait till the copy is done.
The only worry I would have here is the possibility that some of the music files have been corrupted. If you have any of these, copying them is not a good idea. They need to be trashed asap. Unfortunately I don't think you can find them without a diagnostic and repair program. I use DiskWarrior. However it costs $100. I have never been sorry I paid the money but you don't have to feel the same way. You can go ahead and do your copy without it. The chances are small that there will be a file corruption problem on the disk.