i have backed up all my music on an external hard drive and i was wondering is there a quick way to put it all back on itunes.

Hello, Gazzlaa84.

You can import your media a couple different ways. If you plan on keeping the media on the external drive, I would just direct iTunes to read the media folder on the external. Here are the steps on how to make that change.

iTunes for Windows: Moving your iTunes Media folder

http://support.apple.com/kb/HT1364

iTunes for Mac: Moving your iTunes Media folder

http://support.apple.com/kb/HT1449

Also, here is another great resource for moving your iTunes media.

iTunes: How to move your music to a new computer

http://support.apple.com/kb/HT4527

Cheers,

Jason H.