I cannot be able to upload 50MB software to server via FileZilla

Well, seems like you’re getting into the file size limit, which is 10 MB for any file that isn’t a HTML, a PHP or a .htaccess file, and is also explained here:

If you want to upload a large website, you’ll be better off extracting the ZIP file to your computer (if that’s what you’re trying to upload) and then upload the extracted content inside your domain’s htdocs folder through your FTP client (which is FileZilla). This is also explained on this article: