How i can setup raid 5 step by step (wd my cloud ex4)

hi there.
i tried to install my wd ex4 nas my cloud.
i have bben setup my network and uses already.
that issues i checked raid 5 but disk capacities looks 0 gb.
how i can set raid5 on my ex4 cloud.
is anyone might help me ?
thanks for helps.

Post screenshots.

thats all. Thnks

Looks like you didn’t set up a volume. Click the Setup RAID Mode button and proceed from there.