Hello all, Can really use some help setting up raid, thanks

I’ve been using Mac for almost 20 years and WD for about 15. But for whatever reason, I’ve never tried to set up a raid array. I recently came across 2 WD thunderbolt Duos (made specifically for raid).
I figured with all my years using Mac and WD I wouldn’t have a problem, but I can’t seem to get up and running. I was hoping someone here with some more experience could be so kind as to lend some help.
thank you

Hi @greatgoodgod,

Please refer to the article which RAID set is best for each environment:

Please refer to the article How to Upgrade the Drives on a My Cloud Device (RAID Expansion):