diff --git a/specification/storage/resource-manager/Microsoft.Storage/stable/2019-04-01/storage.json b/specification/storage/resource-manager/Microsoft.Storage/stable/2019-04-01/storage.json
index 189abbcff16a..283bcde4fc4f 100644
--- a/specification/storage/resource-manager/Microsoft.Storage/stable/2019-04-01/storage.json
+++ b/specification/storage/resource-manager/Microsoft.Storage/stable/2019-04-01/storage.json
@@ -1381,6 +1381,18 @@
           "type": "boolean",
           "x-ms-client-name": "IsHnsEnabled",
           "description": "Account HierarchicalNamespace enabled if sets to true."
+        },
+        "largeFileSharesState": {
+          "type": "string",
+          "enum": [
+            "Disabled",
+            "Enabled"
+          ],
+          "x-ms-enum": {
+            "name": "LargeFileSharesState",
+            "modelAsString": true
+          },
+          "description": "Allow large file shares if sets to Enabled. It cannot be disabled once it is enabled."
         }
       },
       "description": "The parameters used to create the storage account."
@@ -1656,6 +1668,18 @@
           "x-ms-client-name": "FailoverInProgress",
           "description": "If the failover is in progress, the value will be true, otherwise, it will be null.",
           "readOnly": true
+        },
+        "largeFileSharesState": {
+          "type": "string",
+          "enum": [
+            "Disabled",
+            "Enabled"
+          ],
+          "x-ms-enum": {
+            "name": "LargeFileSharesState",
+            "modelAsString": true
+          },
+          "description": "Allow large file shares if sets to Enabled. It cannot be disabled once it is enabled."
         }
       },
       "description": "Properties of the storage account."
@@ -1806,6 +1830,18 @@
           "description": "Network rule set",
           "x-ms-client-name": "NetworkRuleSet",
           "$ref": "#/definitions/NetworkRuleSet"
+        },
+        "largeFileSharesState": {
+          "type": "string",
+          "enum": [
+            "Disabled",
+            "Enabled"
+          ],
+          "x-ms-enum": {
+            "name": "LargeFileSharesState",
+            "modelAsString": true
+          },
+          "description": "Allow large file shares if sets to Enabled. It cannot be disabled once it is enabled."
         }
       },
       "description": "The parameters used when updating a storage account."