What step of the troubleshooting theory is it important to perform backups?

Performing backups is crucial during the "Preparation" step of the troubleshooting theory. This step involves ensuring that all important data and configurations are secured before making any changes to a system. Backups safeguard against data loss, allowing for recovery if troubleshooting efforts lead to unintended consequences or system failures. By prioritizing backups, you can mitigate risks and ensure a smoother resolution process.