Compressing files to a ZIP archive is a great way to upload files quickly to a server. It'll also save your bandwidth. You can use WinZIP or WinRAR to compress files on your local computer. And after uploading compressed file to the server, you need to use Putty to unzip files because neither FileZilla nor Virtualmin file managers support extracting ZIP files.

So login to your server with administrative user with Putty. And then navigate to document root of the domain.

cd $HOME/public_html

Now run following command to extract the zip file. Replace myfile with your file name.

unzip myfile.zip

You'll be able to see the status on the Putty screen.