Update driver-parameters.md

Author: andyzhangx

docs/driver-parameters.md

@@ -13,9 +13,9 @@ Name | Meaning | Example | Mandatory | Default value
 skuName | Azure storage account type (alias: `storageAccountType`) | `Standard_LRS`, `Premium_LRS`, `Standard_GRS`, `Standard_RAGRS` | No | `Standard_LRS`
 location | Azure location | `eastus`, `westus`, etc. | No | if empty, driver will use the same location name as current k8s cluster
 resourceGroup | Azure resource group name | existing resource group name | No | if empty, driver will use the same resource group name as current k8s cluster
-storageAccount | specify the Azure storage account name which has the blob container | STORAGE_ACCOUNT_NAME | No | if empty, driver will find a suitable storage account that matches `skuName` in the same resource group; if a storage account name is provided, storage account must exist
+storageAccount | specify Azure storage account name| STORAGE_ACCOUNT_NAME | - No for blobfuse mount </br> - Yes for NFSv3 mount |  - For blobfuse mount: if empty, driver will find a suitable storage account that matches `skuName` in the same resource group; if a storage account name is provided, storage account must exist. </br>  - For NFSv3 mount, storage account name must be provided
 protocol | specify blobfuse mount or NFSv3 mount | `fuse`, `nfs` | No | `fuse`
-containerName | specify the existing container name where blob storage will be created | existing container name | No | if empty, driver will create a new container name, starting with `pvc-fuse`
+containerName | specify the existing container name | existing container name | No | if empty, driver will create a new container name, starting with `pvc-fuse`
 server | specify Azure storage account server address | existing server address, e.g. `accountname.privatelink.blob.core.windows.net` | No | if empty, driver will use default `accountname.blob.core.windows.net` or other sovereign cloud account address
 
  - `fsGroup` securityContext setting