Write down your SRP and store it in a safe and secure location. Be sure to write down your SRP exactly as it's displayed, with the correct numbering and spelling.
For best security practices, consider manually writing down your SRP on a physical object such as a piece of paper (which you can laminate and keep in a fireproof safe or safety deposit box) or a metal solution such as Cryptosteel or Blockplate.
Important: Do not take a screenshot of your SRP, nor email or text it to yourself, or generally store it anywhere on your device unless storing in an encrypted password manager.