I use both ways, but prefer one of them. 1.-net2ftp script FTP (Easy Install) 2.-But a better option is pydio (Installing more complex) https://www.howtoforge.com/using-pydio-in-an-ispconfig-3-multiserver-installation
that would be awesome for beginers like me the tuto to install ISPConfig are great and this function would be a real plus for fresh install server management