Using two external drives for Aperture

That configuration, library in internal, original referenced on one external and a vault on an other external is fine.

Do you have a specific question or were you just asking for confirmation?

Message was edited by: Frank Caggiano - Just make sure the externals are formatted OS Extended

As I wrote that isn't a problem, Aperture will handle that just fine. Just make sure the external drives are formatted correctly.

That configuration, library in internal, original referenced on one external and a vault on an other external is fine.

Do you need directions how to do it?

See this link: Format external drives to Mac OS Extended before using with Aperture

OK here goes:

What I want to do is keep the programme Aperture on the computer a

For the Aperture program you do nothing of course it is already where you want it.

and have the photos on the external

OK here I need to confirm, you want to move the originals to the external but keep the library itself on the internal, correct? If so you would select all the images in your library and run File->Relocate Originals… from Aperture.

You will get a window that will let you select where you want the originals moved to (the external disk in your case) and how you want the folder structure that the originals will be put in to look.

with a backup (Vault) on the other external,

Once you have the library setup the way you want create a vault on the other external drive (File->Vault->Add Vault)and update it. Remember once the originals are referenced they will not be backed by the vault operation you will need to backup the originals using some other method.

Glad it helped

regards