diff --git a/data/src/main/java/one/nem/lacerta/data/repository/Commons.java b/data/src/main/java/one/nem/lacerta/data/repository/Commons.java
index 7e390d91..d1bc7db9 100644
--- a/data/src/main/java/one/nem/lacerta/data/repository/Commons.java
+++ b/data/src/main/java/one/nem/lacerta/data/repository/Commons.java
@@ -1,4 +1,9 @@
 package one.nem.lacerta.data.repository;
 
+import java.nio.file.Path;
+
 public interface Commons {
+
+    Path getExternalFilesDir(String type);
+
 }