Download .zip file backgup

Hi, the restore from backup function is not working for me to clone my site. I would like to do it manually via SFTP, but I cannot figure out how to download the .zip backup file to place manually in my site’s folder to then reference with the link. How do I download the .zip backup to my computer?

https://ww.wp.xz.cn/plugins/wp-clone-by-wp-academy/