Q: Itunes library help requested - can't access music or backup phone

Hi helicopterfluff,

Welcome to Apple Support Communities.

iTunes can switch between libraries and even create new libraries if you launch it while holding Shift. Take a look at the articles below for more details about opening alternate libraries and the default locations of iTunes library files.

iTunes: How to open an alternate iTunes Library file or create a new one

http://support.apple.com/kb/ht1589

Create or choose a different iTunes Library file

1. If iTunes is running, quit iTunes.
2. If you're using Windows, hold down the Shift key and from the Start menu, choose All Programs > iTunes > iTunes.
3. If you're using a Mac, open iTunes and immediately hold down the Option key.

Where are my iTunes files located?

http://support.apple.com/kb/HT1391

About the iTunes library files

Your iTunes library files track the media you add to iTunes, how you've organized it, and other information such as playlists. By default, these two files are in your iTunes folder:

• Mac OS X: /Users/username/Music/iTunes/
• Windows XP: C:\Documents and Settings\username\My Documents\My Music\iTunes\
• Windows Vista: C:\Users\username\Music\iTunes\
• Windows 7: C:\Users\username\My Music\iTunes\
• Windows 8: C:\Users\username\My Music\iTunes\

About the iTunes Media folder

Note: You may have an iTunes Music folder instead of an iTunes Media folder.

-Jason