Nas software to host my stuff for Kodi any idea?

What is the best solution, for storage of my “legal” Movies for viewing in Kodi.

After i broke yet another Nas and my fingers, i am thinking of simply using my 2 PC Z87 pro V edition as a Nas.
But i also want to be able to Dual-boot with my Windows 10, so any thoughts, on software?
Freenas is out, because you can’t dual-boot, Ubuntu Server perhaps, but would like a GUI of sorts.

And if possible i would like to manage it from within Kodi if Possible?
So what is the best choice for my Movies Music and etc and if possible to manage from within Kodi if that is possible at all?

Thank You