diff --git a/Plugins/Android/GooglePlayDownloader.cs b/Plugins/Android/GooglePlayDownloader.cs
index 31a655e..5dabc0c 100644
--- a/Plugins/Android/GooglePlayDownloader.cs
+++ b/Plugins/Android/GooglePlayDownloader.cs
@@ -92,6 +92,21 @@ public static void FetchOBB()
 			}
 		}
 	}
+
+    public static void DeleteOldObbFiles(string expansionFilePath)
+    {
+        if (string.IsNullOrEmpty(expansionFilePath))
+            return;
+
+        for (int i = 1; i < obb_version; i++)
+        {
+            string obbFile = string.Format("{0}/main.{1}.{2}.obb", expansionFilePath, i, obb_package);
+            if (File.Exists(obbFile))
+            {
+                File.Delete(obbFile);
+            }
+        }
+    }
 	
 	// This code will reuse the package version from the .apk when looking for the .obb
 	// Modify as appropriate