kubernetes azure nodes exceed max volume count
For this issue, the VM size you use is Standard E2s_v3, the max disk count for each VM is 4, so the most available disk count for your cluster which has 4 nodes is 16. So even if the max disk count limit is 64 for the Kubernetes cluster which has 4 nodes, but you cluster only can use 16 disks at most.
Then the solution is simple, use more nodes or choose another VM size which allows more disk count.