Let's say I wanted to use another FTP program like FileZilla to FTP my work to my account, because I literally have thousands of files to upload sometimes and Plesk is INCREDIBLY slow.
I've tried entering the IP address, username, and password as provided here, but the error I get is (530) Cannot connect to server. Is there a proper hostname I could use instead of the IP address?
Please use our forum.sp.parallels.com for such questions. In short, yes – you can use filezilla for such task.