I only used NASes for bulk storage, as big as I could reasonably afford (back a ways, 4/6/8TB). Hooked up right to the back of my router, accessible from any ’puter that got onto my net. Could be wired, too.
Then I found that as long as the drives were powered, I could hook up plain ol’ external USB drives to the back of the router, too. It’d even work on usb flash-thingies, but not usb spinny-disks.
I’m still using the same WD routers even today, going uninterrupted for who knows how many years, 24/7. Yeah, WD as in Western Digital, they actually made routers, too. And pretty good, too. Dual-band 2.4Ghz and 5GHz, iirr.
Drives, I always stuck with WD NASes (RAIDable, too). So an 8TB drive with 2 physical 4TB drives inside could be configured as a single 8TB drive, or RAIDed as a single redundant 4TB drive. RAID0, RAID1, whatever that is.
Now I pretty much just stick to external USB drives, Seagate and WD.
Oh, I keep things separate, too. One router is JUST internal, zero connection to the outside world, airgapped, wifi disabled, wired-access only. Another router has 2 networks set up, one internal-only but via wifi, the other that plus innernet access. Airgapped network has zero connection to that.
I might stick a small external usb drive onto the wifi router just for movies and the like, but that’s it.
Anyway, whichever way you want to do it — wired and airgapped, wifi internal, wifi all-access — whatever’s tweaked on one drive will be accessible to everything else on that net instantly… unless things are buffered, or there are “lazy writes”, etc.