To make a copy of website files, perform the following steps:
1 - Logged in to Plesk, https://your domain name:8443.
2 - Go to Websites & Domains, and find the name of the website you want to copy.
3 - Click Website Copying.
4 - To copy website files to the document root of an existing site:
A - Select the option Website in Plesk.
B - Select the destination site from the Site name menu.
C - Specify what to do with the files that might already be present in the destination directory.
5 - To copy website files to an FTP account on this or another server:
A - Select the option FTP storage.
B - Specify the server's host name and credentials for connecting to the FTP account.
C - In the FTP connection method field, leave the Active mode option selected. If Plesk fails to connect to the external FTP account, select the Passive mode option here.
6 - Click OK.