I have my server login info, but I do not know how to log onto our FTP server on your site
I have my server log in information (User name, PW) but I do not know where I input that info on this site/software.
I have my server log in information (User name, PW) but I do not know where I input that info on this site/software.
You would use an FTP client like Filezilla, Cyberduck, Transmit, or the like with your server credentials.
This may help to get you started...
https://www.digitalocean.com/community/tutorials/how-to-use-filezilla-to-transfer-and-manage-files-securely-on-your-vps