Is there another way to transfer files from one server to another other than putting said files in a directory viewable to the web and using wget.

FTP, and if so, how?

Both are plesk servers.

 

You can use scp, which is the most reliable way to transfer. Try:

man scp

from command line.

 

Another suggestion, use rsync. Rsync will synchroize the files from one system to another, and when used multiple times will only transfer the files that have changed. In addition it will maintain ownership, and permissions from one system to another. Example:

rsync -av -e ssh <source> <destination>

example2:
rsync -av -e ssh root@server1.domain.com:/home/httpd/ /backup/home/httpd/

This would copy all the files from the directory /home/httpd/ on server1.domain.com, to /backup/home/httpd/ on the system from which you are running rsync.