I’m going to show you how to mount your Airport Extreme network attached drive via Terminal. I wanted to do this manually because I want to run a single command to backup my data using rsync (read my rsync blog HERE).
Applications > Utilities > Terminal
First make a directory for the volume you wish to mount
mkdir /Volumes/My\ Passport
Then mount the drive
mount_smbfs //username:password@yourairportname/yourdrivename/ /Volumes/yourdirectory
mount_smbfs //username:password@tommys-airport-/My%20Passport/ /Volumes/My\ Passport
mount_smbfs — mount a shared resource from an SMB file server
When you’re done, unmount the drive
umount /Volumes/My\ Passport
Note: Use %20 in place of all your blank spaces within the mount name.