FreeNAS on an ASUS + RAID board. Does all the protocols not just the three mentioned and FTP. Oh boy, hardly call that NAS-centric.
For RAID10 to be worth the effort the minimum you should use is 3 pairs of hdd (didn't see RAID 10 as an option). 6 hdds with 50% redundancy. So if you were to use 2TB drives you would get a max of 6TB storage and 6TB of redundancy.
Want to run a heavy database driven application?
RAID 100 or plaid RAID would be the better one to go for. Many small businesses or startups do this. This product couldn't support that.
$420 can buy you a small form case with a number of designs that house many drive bays, mobo with onboard RAID, Graphics, multiple Gigabit ethernet adapters, good powersupply.
You can then go even further and utilise USB2.0 and throw external USB drives for another layer of data sharing.
All this and more and not stuck with a poorly put together product that limits the imagination because of its short comings.
All that and more from your local computer needs store.