I’ve recently gotten into homelabs I’ve got a Mini-PC running Immich and Home-Assistant

I’d like to setup a NAS for the Immich server to save media to.

I’m very new to the game and only recently started looking into this.

One requirement for me is it must be Open-Source. TrueNAS?

What hardware would you recommend? Having 2TB for now with the ability to expand it would be great, a small size would also be ideal.