The Cisco Unity Express voice mails can be backed up and restored using the CLI or GUI backup option. Cisco Unity Express backup and restore functions use an FTP server to store and retrieve data. Some recommended backup servers are FileZilla FTP server, GuildFTPd, Serv-U FTP server or Microsoft IIS FTP server.
For details on backing up Cisco Unity Express, see the Cisco Unity Express Installation and Upgrade Guide 
.