Great device
I have attached a 6TB USB3 Hard disk to it and functions perfectly. The My cloud portion of it works well, unless you want to access your control panel. It is limited on ram, when you strip services it is a rock solid performer.
Works fairly well in Ultimate Edition Linux (writing software to auto detect it) I am by hobby an Operating System Architect & Leading Programmer; I see at peak 110 MB/s via avg 90 MB/s, 80 at the low; Make sure you have Gigabit; Cables mean a ton, do not bottleneck yourself.
I have a Quad Core Atom running Win 10 (Voyo V2) used as a media center in the bedroom and can not find the NAS even with Western Digitals software & hard wired; It has a USB Netgear AC 6200 wireless adapter, I am currently fighting with, because the integrated is something to be desired.