I use the cute TS-230 NAS and i think for home use is it cool. But i think it hase an secure problem, that the saved password for the encrypted volume dont clear at the soft reset via reset button pressed 3 seconds.
Why? A person break into my house and steal my NAS. Reset at home and gets my data. Or other people like partypeople of our childs soft reset the NAS (Smartphone + Qnap Manager + WLAN + ResetButton are a bad combination)
At my home i dont need a 24/7 NAS so i send the NAS at night sleep. So my famely can use the NAS without use the encryt key for volumes i stored this keys at the NAS. Comfortable.
Solution: NAS soft reset cleared the stored volume encryption key and the admin must then first enter the password.
Or is there already a convenient solution? Like fingerprint reader via usb?
(
ps: New post because Don wrote i dont answer on an old Post. Yes, i know that was an old post, but i would like to avoid an doupble post. 
I hope i dont get now replays like "well, double post, you d...a.." ^_^ )
