Data Export Service for org backups
Key Takeaway
Data Export Service runs in the browser and exports your org's data on demand or on a weekly or monthly schedule. Professional Edition and Developer Edition can schedule only monthly exports.
Data Export Service is a built-in Setup tool that exports your org's data into a set of comma-separated values (CSV) files. Admins need their own backup plan for business data, and Data Export Service is one of the main options.
Why you need your own backup plan
Data protection is a shared responsibility. Salesforce securely hosts encrypted data and keeps backups for infrastructure-level disaster recovery. Outside that type of event, Salesforce can't restore business-level data, so you need your own backup plan for user error, integration downtime, or other data loss.
Consider backing up metadata along with business data, so you can also protect and restore your customizations. Metadata includes items such as custom fields, layouts, Reports, and Apex code.