diff --git a/examples/customHTML/.vscode/settings.json b/examples/customHTML/.vscode/settings.json
index 930ff050..02e74bf4 100644
--- a/examples/customHTML/.vscode/settings.json
+++ b/examples/customHTML/.vscode/settings.json
@@ -1,5 +1,6 @@
 {
     "files.associations": {
-        "*.tcc": "cpp"
+        "*.tcc": "cpp",
+        "ostream": "cpp"
     }
 }
\ No newline at end of file
diff --git a/examples/customHTML/customHTML.ino b/examples/customHTML/customHTML.ino
index fbf20a2b..46076502 100644
--- a/examples/customHTML/customHTML.ino
+++ b/examples/customHTML/customHTML.ino
@@ -212,7 +212,7 @@ void setup() {
   // Add custom page title to /setup
   server.setSetupPageTitle("Test setup page");
   // Add custom logo to /setup page with custom size
-  server.setLogoBase64(base64_logo, "128", "128", /*overwite file*/ true);
+  server.setLogoBase64(base64_logo, "128", "128", /*overwite file*/ false);
 
   // Enable ACE FS file web editor and add FS info callback fucntion
   server.enableFsCodeEditor();
diff --git a/src/AsyncFsWebServer.cpp b/src/AsyncFsWebServer.cpp
index d8f1a26a..33bc354d 100644
--- a/src/AsyncFsWebServer.cpp
+++ b/src/AsyncFsWebServer.cpp
@@ -266,24 +266,26 @@ void AsyncFsWebServer::setLogoBase64(const char* logo, const char* width, const
     strcat(filename, "_");
     strcat(filename, height);
     strcat(filename, ".txt");
+
     optionToFile(filename, logo, overwrite);
     addOption("img-logo", filename);
 }
 
 bool AsyncFsWebServer::optionToFile(const char* filename, const char* str, bool overWrite) {
     // Check if file is already saved
-    File file = m_filesystem->open(filename, "r");
-    if (file && !overWrite) {
-        file.close();
+    if (m_filesystem->exists(filename) && !overWrite) {
         return true;
     }
     // Create or overwrite option file
     else {
-        file.close();
-        file = m_filesystem->open(filename, "w");
-
+        File file = m_filesystem->open(filename, "w");
         if (file) {
+            #if defined(ESP8266)
+            String _str = str;
+            file.print(_str);
+            #else
             file.print(str);
+            #endif
             file.close();
             log_debug("File %s saved", filename);
             return true;
@@ -306,6 +308,7 @@ void AsyncFsWebServer::addSource(const char* source, const char* tag, bool overW
         path += ".css";
     else if (strstr(tag, "javascript") != NULL)
         path += ".js";
+
     optionToFile(path.c_str(), source, overWrite);
     addOption(tag, path.c_str(), false);
 }
diff --git a/src/AsyncFsWebServer.h b/src/AsyncFsWebServer.h
index 4593299a..00ce8ccc 100644
--- a/src/AsyncFsWebServer.h
+++ b/src/AsyncFsWebServer.h
@@ -30,7 +30,7 @@
 #define CONFIG_FILE "/config.json"
 
 #define DBG_OUTPUT_PORT     Serial
-#define LOG_LEVEL           3         // (0 disable, 1 error, 2 info, 3 debug)
+#define LOG_LEVEL           2         // (0 disable, 1 error, 2 info, 3 debug)
 #include "SerialLog.h"
 #include "CaptiverPortal.hpp"