Currently Being ModeratedNov 19, 2012 5:14 AM (in response to Elia108)
Sure, you select the project in the Finder and use "File > Duplicate" from the main menu bar, or the Keyboard shortcut ⌘D.
Or save a second copy from GarageBand: File > Save as and enter a different name.
Currently Being ModeratedNov 19, 2012 5:13 AM (in response to Elia108)
Can you make a copy of a garageband file as a whole
ctrl-click the project file in Finder and choose Duplicate