My main Library of Aperture on my main HD is 120GB and my backup Vault on my external HD is 116GB. Do I want to "replace the contents of my Vault with the contents of my Library"? Unfortunately I also have on my external HD another library that is tiny 2 GB, how do I know which library Aperture is talking about? In the ApertureGUI my Vault show only 22GB. Confused, please help.
I'm on a Mac with Snow Leopard 10.6.4 and Aperture firstname.lastname@example.org