diff --git a/models/augments/persistent-storage.yang b/models/augments/persistent-storage.yang
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+/*
+  Copyright ETSI
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+module persistent-storage {
+    yang-version 1.1;
+    namespace "urn:etsi:osm:yang:augments:persistent-storage";
+    prefix "persistent-storage";
+
+    import etsi-nfv-descriptors {
+        prefix descriptors;
+    }
+
+    import etsi-nfv-vnfd {
+        prefix vnfd;
+    }
+
+    identity persistent-storage {
+        base descriptors:storage-type;
+        description
+            "Persistent type of storage.";
+    }
+
+    augment "/vnfd:vnfd/vnfd:virtual-storage-desc" {
+        when 'derived-from-or-self(vnfd:type-of-storage, "persistent-storage:persistent-storage")';
+    }
+}
+