I am using itunes 11.0.4 and each time a new app update comes out the old file (old app update) dose not delete from my hard drive) internal or external and sometimes an app will duplicate itself in the hard drive adding an _1 next to the name or _2 or so on what is wrong this going on since iTunes 9 came out. Also is it safe to move the iTunes libiary file (not the media) to an external drive?