I Have a myCloud Ex4

I have a MyCloud Ex4 NAS Drive with 4 bays
i have installed 4 x 2Tb Drives but only see 3.25Tb available, currently used is 671.81 Gb
It seems asif the 4th drive is not being seen yet the Admin Panel shows 4 drives installed.
I have the setup on Raid 5

I recently had to replace a drive due to a “Degraded” error and since then i have an LED that is half blue and half Red and then the available capacity issue above.

Any advice please


Try manually rebuilding the RAID.