I have my iTunes library stored on an external hard drive when using with my MacBook. I've just bought a Mac Mini and want to copy the entire collection over to my Mini's hard drive, but using File > Library > Organise Library and Consolidate files doesn't appear to work. Most files are copied, but some, randomly, aren't. Most of my purchased songs don't get copied either. What's the best way to ensure all of my music files are copied over to my HD so I can copy to my Mini?