PenciDesign Supporter replied
Hi,
1. For the easiest ways, please read the document detail here: https://www.wpbeginner.com/plugins/how-to-backup-restore-your-wordpress-site-with-updraftplus/
2. You can export/import the customization data by installing the Customize Import/Export here: https://wordpress.org/plugins/customizer-reset/
3. Our Penci Header Builder already included the import/export feature, just click the Export button the add new & import the downloaded file.
Regards,
PenciDesign.