Hi Guys,
Backup is always important. Filesystem Backup Module is one of the best tool that you can use to backup Webmin file system.
You can download this module from here >>
http://www.webmin.com/webmin/download/modules/fsdump.wbm.gzAfter installation you will be able to take file system backups very easily with this tool.
It do have both remote and local backup storage options.
Give it a try!