diff --git a/src/ESPUI.h b/src/ESPUI.h
index ceb4748..d02659a 100644
--- a/src/ESPUI.h
+++ b/src/ESPUI.h
@@ -117,6 +117,7 @@ public:
     void prepareFileSystem(bool format = true); // Initially preps the filesystem and loads a lot of
                               // stuff into LITTLEFS
     void list(); // Lists LITTLEFS directory
+    void writeFile(const char* path, const char* data);
 
     uint16_t addControl(ControlType type, const char* label);
     uint16_t addControl(ControlType type, const char* label, const String& value);
@@ -236,6 +237,16 @@ public:
     AsyncWebServer* WebServer() {return server;}
     AsyncWebSocket* WebSocket() {return ws;}
 
+#if defined(ESP32)
+#   if (ESP_IDF_VERSION_MAJOR == 4 && ESP_IDF_VERSION_MINOR >= 4) || ESP_IDF_VERSION_MAJOR > 4
+        fs::LittleFSFS & EspuiLittleFS = LittleFS;
+    #else
+        fs::LITTLEFSFS & EspuiLittleFS = LITTLEFS;
+#   endif
+#else
+    fs::FS & EspuiLittleFS = LittleFS;
+#endif
+
 protected:
     friend class ESPUIclient;
     friend class ESPUIcontrol;