G-Speed Shuttle SSD: Manual und how to open to get access to the ssd´s?

Kind Regards from Germany,
I am a new user of a g-Spped shuttle ssd! Two questions:

  1. Is there a manual especially for the G-Speed Shuttle SSD?
  2. How to open the S-Speed shuttle ssd to handle the ssd´s? Just by handcraft or by software? My new G-Speed shuttle ssd is locked by a plastic circle at the opening flap! It seem to be very hard to open, so that i was afraid to break it! …and there is no information to find about the procedure to open the open flap!
    I need help, or is it just a lack of my courage ?