I've been buying these little boxes from AliExpress for years to use as firewalls and routers. My oldest one is almost 9 years old now! OpenBSD installs just fine. Just a BIOS tweak to always boot up after power is restored.
How?
I've been thinking about setting up one of these cheap boxes as a NAS but I cannot ever find one with 4 Sata ports. Is there a solution for this?
I could use external USB Hard drives but that just feels so janky...
Can't speak to cheap boxes, so usb might be the way, but I use a Zimaboard. Two built in SATA ports, and a pci-e daughter card gives me two more ports. Full disclosure, i don't do anything more than 1080p, bad eyesight...
I'd love to use a Zimaboard too but they're not available were I live.
I could import one but the currency conversion + import taxes make it very not worth it.