Clone Prestashop

How can I clone a prestashop in same server but different domain
or even same domain to test an upgrade?

The database is large, and even if I placed a backup in a bakup folder in new domain does not even find it through the panel. I have version 1.9.4
I can place all the files through ftp but cannot even import dbase through Phpmyadmin as give me error
Any ideas?

Thank you

I only need to clone a prestashop website, to make tests for update. Problem is a dbase over 650 megas. Thank you.

I miss some features to make life easier