I’m just unsure if I want to keep it running 24/7
This is exactly how I’d think about my daily driver. Unless the laptop you mentioned turns out to be a spare, that is…
You’d be surprised on what modern router got these days. I got a Linksys e8450 running OpenWRT on 512 MB of RAM and 1.35GHz of dual ARM core. Regardless I wouldn’t want to push it as I’d be in great trouble if that thing goes down (my whole household depends on it).
I do believe that router can serve files with no issue, just that it’d be limited to the USB 2.0 that it has. I’d still want a dedicated device regardless just so that I won’t feel bad about breaking it from time to time.
s p a r k l i n g