I am unfamiliar with MyCloud but guess it is one of the various NAS appliances. Just in case, I feel compelled to mention that RAID is not a substitute for backup(s). I'm insane and run RAID6 with 2 hot spares but I still keep backups. The biggest reason is accidental file deletion. Another is external damage to the system (dropping it, kid spills a cup of OJ into it, power surges, kid discovers pulling drives makes for pretty lights and sounds, theft, ...).