Login to the Plesk Control Panel to upload website content into remote server through FTP (FileZella).
Below are the descriptions of above number sequence.
1. Write host name in the Host input box.
2. Write FTP user name in the Username input box.
3. Write FTP password in Password input box.
4. Click Quickconnect button to connect with the remote server.
You are done, your have been uploaded a file through FTP (FileZilla).