New HDD not showing up in volume or storage

[SimHns1]

I recently added a second HDD a 24TB to my existing 10TB to my Terramaster F2-212 and it rebuilding my database for 24 hours my storage seems the seem. Despite it not listing the new HDD in both the volume and Pool i have the same 10TB but nothing else. How do i fix this did i set it up wrong? How do i add the 24TB to my storage pool and volume? i followed the link you provided but it doesnt appear to be doing anything

It also wont allow me to add another volume or tweak the allocation for Volume 1. Pictures belows show the HDD is being picking up about its been rebuilt be seemingly isnt available to be used at all. I dont understand why. Tried everything. Any help would be appreciated.

[Gremlin]

I think that looks normal. You are using Traid so adding a second drive you have effectively put it in the equivalent of Raid1. Part of your 24TB is mirroring the existing drive, the rest is 'resting' waiting for a second 24TB drive to catch up.