Heres the scenario that Id like to make happen, but dont know how: I have 2 iphones (my wifes and mine), one MacBook Pro, and an external drive that Ill use for anything iTunes (music, video, apps). I plan to create two user accounts on the MBP (one for her and one for me). How do I point to the external drive and still retain any iTunes settings for playlists, songs, iPhone backups, etc. for each user? Also, what will happen if I purchase a song on my iPhone? Will it upload it to the external? The next time my wife logs on, will it display in iTunes (under her account)? Basically I want the external to house the media files, but each of our MBP user accounts should house iTunes settings (playlists, backup settings, etc.). A huge thanks for any help.