Hi guys,
first of all, thanks god you exist, your work is really useful!
As many users, I have a feature I'd like to have in my NAS: rsnapshot!
For those who don't know this name, is an automated and very efficient software for backup, that makes snapshots without occupy multiplied space, using links in an intelligient way.
Official link: http://www.rsnapshot.org/
It has also a web GUI: https://github.com/dobrevg/webrsnapshot
See ya!
D.