Homelab Database question

I currently run a homelab with a couple of different databases the main one being postgres but have a steadily growing redis database.

I want to significantly expand the available size for these databases but am thinking that the easiest way to do this would be to use a nas and switch to 10 gige. Would this be possible with the qnap or synology nas's that I see available online or would the performance degredation make these nas's no better than a back up.

I was thinking something like a synology DS1621+ with ssd's and the upgraded network interface but am unfamiliar with running database storage across the network like this.