What is the largest partition you can build on the My Cloud EX4100 using Raid 5?
The capacity says 32TB. So can I build a single 24TB RAID 5 partition or am I limited to a 16TB
RAID 5 partition?
If you’re using 8TB drives, then you can create a 24TB RAID5. But don’t call it a partition, because that’s not what that is. 
Good point. Thanxs for the enlightenment. I’m mixed up with file format limits and should have referred to it as a volume right?
You can create a volume within the RAID set, and then shares go inside volumes.
