accessing external drives over a network

[hawken king]

I have a usb2 external hdd and two firewire hdds plugged into a mac mini, I can see the mini from my powerbook, over an airport express network, but not the externals.

Even aliases don't seem to work.

Is there a way to make these into network drives?

I'm using osx 10.4.11 btw.

[MurphyM]

I made a screencast about this very thing that you can see here. That will help since you're on 10.4.

http://murphymac.com/creating-mac-shares/

For Leopard users the Sharing panel in System Preferences makes this easy. Just click on File Sharing and you can add resources to the first column to share them.