Is it worth buying the extra RTC module for Odroid HC4?

Is it necessary? I'm not interested in the OLED display part but is it recomedned to have an RTC on a NAS?

I didn't bother buying the RTC/OLED module. I've an old unused DS3231 module I got on Ali Express. I'll see if I can get that to work with it. Failing that I'll just go with out.

Thought I'd update this for anyone interested. The little DS3231 module works fine on the HC4.
Unfortunately you can't just place it directly on the GPIO pins-- the case just about catches on it when you try to close it up again. So I got some GPIO cables on Ali Express and they allow it to fit neatly down the side.
Tested on Armbian and Debian.