I've loaded mine with 4x2TB Ironwolf HDD in Raid5 configuration. Connected directly to the computer. Works with no hiccups, setup was very easy and is visible as a regular external disc. But. Write and read speeds are ridiculously slow. 5 MB/s write (partially due to Raid 5 parity requirements, but still), 35 MB/s read. Perfect as a "set and forget" backup, ok to stream 2.7k compressed video, but too slow for a daily disk.