Keeps Fortigate Syslog on External DB

Hi,

I need help in how i keeping the syslog on my NAS server.

I have FG100E so i can not use an external hard drive to store log on it.

I thought NAS can act like syslog server but i think it's not.

So can i create SQL database on NAS to keep the Fortigate syslog on it?

If there's any way to use NAS in syslog.. please help

Thanks