you may setup a RAID array for the DAS enclosure on the computer, while some DAS enclosures have RAID choices created-in to make points less difficult.
The four-bay QNAP TS-464 has a similar hardware as our decide, but https://berthaaiui781945.blogkoo.com/about-experts-in-nas-networking-smart-surveillance-hard-disk-computer-and-laptop-49001959