diff --git a/filesystem/android/src/main/java/com/capacitorjs/plugins/filesystem/FilesystemPlugin.java b/filesystem/android/src/main/java/com/capacitorjs/plugins/filesystem/FilesystemPlugin.java
index eef29742a..f3e8c3cbe 100644
--- a/filesystem/android/src/main/java/com/capacitorjs/plugins/filesystem/FilesystemPlugin.java
+++ b/filesystem/android/src/main/java/com/capacitorjs/plugins/filesystem/FilesystemPlugin.java
@@ -169,6 +169,8 @@ private void saveFile(PluginCall call, File file, String data) {
                 ex
             );
             call.reject("FILE_NOTCREATED");
+        } catch (IllegalArgumentException ex) {
+            call.reject("The supplied data is not valid base64 content.");
         }
     }