title: How to downgrade a AWS EC2?
body: <p>I have an Amazon Web Service EC2 virtual server large type. Now I want to downgrade it to small type. I want to keep the hard disk information but just download the configure of the server. The main reason is to save few bucks. How can I do this?</p>
  
  <p>I think I should:</p>
  
  <ol>
  <li>stop the current instance.</li>
  <li>detach the volume from the current instance.</li>
  <li>terminate the instance.</li>
  <li>recreate a new small-type instance from scratch.</li>
  <li>attach the volume to the small-type instance.</li>
  </ol>
  
  <p>I am not sure whether this is the correct way to do the downgrade or they have some formal way to do it. I tried to look up from the doc but couldn't find anything useful. I think someone here must be able to help me. Thank you very much.</p>