Want to move aperture library to different drive?

I want to get this right the first time. I did a search and could not find my exact question.

I have my aperture library on an external drive. I want to move it from that external drive to a different external drive. I think I do the following:

1. Tell aperture that my library is now on new external drive (via preferences).
2. Quit aperture.
3. Go to finder and drag aperture library icon from old external drive onto the new one.
4. Start aperture.

Is this correct? Thanks in advance!