Merge pull request #180340 from andyzhangx/patch-31

Update azure-files-csi.md

Author: PRMerger3

articles/aks/azure-files-csi.md

@@ -3,7 +3,7 @@ title: Use Container Storage Interface (CSI) drivers for Azure Files on Azure Ku
 description: Learn how to use the Container Storage Interface (CSI) drivers for Azure Files in an Azure Kubernetes Service (AKS) cluster.
 services: container-service
 ms.topic: article
-ms.date: 11/09/2021
+ms.date: 11/18/2021
 author: palma21
 
 ---
@@ -21,7 +21,7 @@ To create an AKS cluster with CSI driver support, see [Enable CSI drivers for Az
 
 ## Use a persistent volume with Azure Files
 
-A [persistent volume (PV)](concepts-storage.md#persistent-volumes) represents a piece of storage that's provisioned for use with Kubernetes pods. A PV can be used by one or many pods and can be dynamically or statically provisioned. If multiple pods need concurrent access to the same storage volume, you can use Azure Files to connect by using the [Server Message Block (SMB) protocol][smb-overview]. This article shows you how to dynamically create an Azure Files share for use by multiple pods in an AKS cluster. For static provisioning, see [Manually create and use a volume with an Azure Files share](azure-files-volume.md).
+A [persistent volume (PV)](concepts-storage.md#persistent-volumes) represents a piece of storage that's provisioned for use with Kubernetes pods. A PV can be used by one or many pods and can be dynamically or statically provisioned. If multiple pods need concurrent access to the same storage volume, you can use Azure Files to connect by using the [Server Message Block (SMB)][smb-overview] or NFS protocol. This article shows you how to dynamically create an Azure Files share for use by multiple pods in an AKS cluster. For static provisioning, see [Manually create and use a volume with an Azure Files share](azure-files-volume.md).
 
 For more information on Kubernetes volumes, see [Storage options for applications in AKS][concepts-storage].
 
@@ -34,6 +34,7 @@ A storage class is used to define how an Azure Files share is created. A storage
 * **Standard_ZRS**: Standard zone-redundant storage
 * **Standard_RAGRS**: Standard read-access geo-redundant storage
 * **Premium_LRS**: Premium locally redundant storage
+* **Premium_ZRS**: Premium zone-redundant storage
 
 > [!NOTE]
 > Azure Files supports Azure Premium Storage. The minimum premium file share is 100 GB.