Asustor's Flashstor FS6706T is a slim six-bay network attached storage (NAS) drive that, to achieve its extraordinary performance, demands a pretty penny for the M.2 SSDs it uses instead of cheaper hard drives.
The Synology DiskStation DS1522+ is an excellent five-bay network attached storage (NAS) device for homes and small businesses, with speedy performance and available 10Gbps networking.