suggestions for a backup solution

[yudi v]

I am setting up a FreeBSD back-up server with zfs two way mirror. I want to
back up only data files from a Linux machine and a Windows PC.

Bacula seems like an overly complex option.

What's the most efficient and simple solution to backup just the data files
from both windows and linux machines to the server.

Another option is to run samba on the BSD server and just use windows
backup and rsync for Linux.

Any interesting suggestions?

-- 
Kind regards,
Yudi