diff --git a/Aaru.CommonTypes/MediaType.cs b/Aaru.CommonTypes/MediaType.cs
index 29557dced..4b5fc6d5c 100644
--- a/Aaru.CommonTypes/MediaType.cs
+++ b/Aaru.CommonTypes/MediaType.cs
@@ -1625,6 +1625,9 @@ public enum MediaType : uint
     ISO_14517_512 = 803,
     /// <summary>3,5", M.O., 1041500 sectors, 512 bytes/sector, ISO 15041, 540Mb/cart</summary>
     ISO_15041_512 = 804,
+    /// <summary>3,5", M.O., ??????? sectors, propietary, 650Mb/cart, Sony HyperStorage</summary>
+    [Description("Sony HyperStorage")]
+    HSM650 = 805,
 
 #endregion Magneto-optical, types 800 to 819
 
diff --git a/Aaru.CommonTypes/Metadata/MediaType.cs b/Aaru.CommonTypes/Metadata/MediaType.cs
index b452bcdfa..c6ac1c626 100644
--- a/Aaru.CommonTypes/Metadata/MediaType.cs
+++ b/Aaru.CommonTypes/Metadata/MediaType.cs
@@ -917,6 +917,11 @@ public static class MediaType
                 discType    = "3.5\" magneto-optical";
                 discSubType = "ISO 15041";
 
+                break;
+            case CommonTypes.MediaType.HSM650:
+                discType    = "3.5\" magneto-optical";
+                discSubType = "Sony HyperStorage";
+
                 break;
             case CommonTypes.MediaType.FlashDrive:
                 discType    = "USB flash drive";