diff --git a/esp3d/configuration.h b/esp3d/configuration.h
index 131e4154..06dcc21f 100644
--- a/esp3d/configuration.h
+++ b/esp3d/configuration.h
@@ -127,6 +127,9 @@
 //ESP_LITTLEFS_FILESYSTEM     2
 #define FILESYSTEM_FEATURE ESP_SPIFFS_FILESYSTEM
 
+//Allows to mount /FS and /SD under / for FTP server
+#define GLOBAL_FILESYSTEM
+
 //DIRECT_PIN_FEATURE: allow to access pin using ESP201 command
 #define DIRECT_PIN_FEATURE
 
diff --git a/esp3d/src/core/commands.cpp b/esp3d/src/core/commands.cpp
index f7dea6bc..49295f0d 100644
--- a/esp3d/src/core/commands.cpp
+++ b/esp3d/src/core/commands.cpp
@@ -564,6 +564,19 @@ bool Commands::execute_internal_command (int cmd, const char* cmd_params, level_
         response = ESP750(cmd_params, auth_type, output);
         break;
 #endif //SD_DEVICE
+#if defined (GLOBAL_FILESYSTEM)
+    //List Global Filesystem
+    //[ESP780]<Root> pwd=<admin password>
+    case 780:
+        response = ESP780(cmd_params, auth_type, output);
+        break;
+    //Action on Global Filesystem
+    //rmdir / remove / mkdir / exists
+    //[ESP790]<Action>=<path> pwd=<admin password>
+    case 790:
+        response = ESP790(cmd_params, auth_type, output);
+        break;
+#endif //GLOBAL_FILESYSTEM
     //Get fw version firmare target and fw version
     //eventually set time with pc time
     //output is JSON or plain text according parameter
diff --git a/esp3d/src/core/commands.h b/esp3d/src/core/commands.h
index c67b8574..0a9e56ea 100644
--- a/esp3d/src/core/commands.h
+++ b/esp3d/src/core/commands.h
@@ -132,6 +132,10 @@ public:
     bool ESP750(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
     bool ESP740(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
 #endif //SD_DEVICE
+#if defined (GLOBAL_FILESYSTEM)
+    bool ESP780(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
+    bool ESP790(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
+#endif //GLOBAL_FILESYSTEM
     bool ESP800(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
     bool ESP900(const char* cmd_params, level_authenticate_type auth_level, ESP3DOutput * output);
 #ifdef BUZZER_DEVICE
diff --git a/esp3d/src/core/espcmd/ESP780.cpp b/esp3d/src/core/espcmd/ESP780.cpp
new file mode 100644
index 00000000..bc496733
--- /dev/null
+++ b/esp3d/src/core/espcmd/ESP780.cpp
@@ -0,0 +1,110 @@
+/*
+ ESP780.cpp - ESP3D command class
+
+ Copyright (c) 2014 Luc Lebosse. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "../../include/esp3d_config.h"
+#if defined (GLOBAL_FILESYSTEM)
+#include "../commands.h"
+#include "../esp3doutput.h"
+#include "../settings_esp3d.h"
+#include "../../modules/authentication/authentication_service.h"
+#include "../../modules/filesystem/esp_globalFS.h"
+#if defined(SD_TIMESTAMP_FEATURE) ||  defined(FILESYSTEM_TIMESTAMP_FEATURE)
+#include "../../modules/time/time_server.h"
+#endif //SD_TIMESTAMP_FEATURE || FILESYSTEM_TIMESTAMP_FEATURE
+//List SD Filesystem
+//[ESP780]<Root> pwd=<admin password>
+bool Commands::ESP780(const char* cmd_params, level_authenticate_type auth_type, ESP3DOutput * output)
+{
+    bool response = true;
+    String parameter;
+    parameter = get_param (cmd_params, "");
+#ifdef AUTHENTICATION_FEATURE
+    if (auth_type != LEVEL_ADMIN) {
+        output->printERROR("Wrong authentication!", 401);
+        return false;
+    }
+#else
+    (void)auth_type;
+#endif //AUTHENTICATION_FEATURE
+    if (parameter.length() == 0) {
+        parameter = "/";
+    }
+    uint8_t fs = ESP_GBFS::getFSType(parameter.c_str());
+    output->printf("Directory on Global FS : %s", parameter.c_str());
+    output->printLN("");
+    if (ESP_GBFS::exists(parameter.c_str())) {
+        ESP_GBFile f = ESP_GBFS::open(parameter.c_str(), ESP_FILE_READ);
+        uint countf = 0;
+        uint countd = 0;
+        if (f) {
+            //Check directories
+            ESP_GBFile sub = f.openNextFile();
+            while (sub) {
+                if (sub.isDirectory()) {
+                    countd++;
+                    output->print("<DIR> \t");
+                    output->print(sub.name());
+                    output->print(" \t");
+                    output->printLN("");
+                }
+                sub.close();
+                sub = f.openNextFile();
+            }
+            f.close();
+            f = ESP_GBFS::open(parameter.c_str(), ESP_FILE_READ);
+            //Check files
+            sub = f.openNextFile();
+            while (sub) {
+                if (!sub.isDirectory()) {
+                    countf++;
+                    output->print("      \t");
+                    output->print(sub.name());
+                    output->print(" \t");
+                    output->print(ESP_GBFS::formatBytes(sub.size()).c_str());
+                    output->print(" \t");
+#if defined(SD_TIMESTAMP_FEATURE) ||  defined(FILESYSTEM_TIMESTAMP_FEATURE)
+                    output->print(timeserver.current_time(sub.getLastWrite()));
+                    output->print(" \t");
+#endif //SD_TIMESTAMP_FEATURE ||  FILESYSTEM_TIMESTAMP_FEATURE              
+                    output->printLN("");
+                }
+                sub.close();
+                sub = f.openNextFile();
+            }
+            f.close();
+            output->printf("%d file%s, %d dir%s", countf, (countf > 1)?"(s)":"", countd, (countd > 1)?"(s)":"");
+            output->printLN("");
+            if (fs != FS_ROOT) {
+                String t = ESP_GBFS::formatBytes(ESP_GBFS::totalBytes(fs));
+                String u = ESP_GBFS::formatBytes(ESP_GBFS::usedBytes(fs));
+                String f = ESP_GBFS::formatBytes(ESP_GBFS::freeBytes(fs));
+                output->printf("Total %s, Used %s, Available: %s", t.c_str(), u.c_str(),f.c_str());
+                output->printLN("");
+            }
+        } else {
+            output->printERROR ("Invalid directory!");
+        }
+    } else {
+        output->printERROR ("Invalid directory!");
+        response = false;
+    }
+    return response;
+}
+
+#endif //GLOBAL_FILESYSTEM
diff --git a/esp3d/src/core/espcmd/ESP790.cpp b/esp3d/src/core/espcmd/ESP790.cpp
new file mode 100644
index 00000000..1fb23ea0
--- /dev/null
+++ b/esp3d/src/core/espcmd/ESP790.cpp
@@ -0,0 +1,98 @@
+/*
+ ESP790.cpp - ESP3D command class
+
+ Copyright (c) 2014 Luc Lebosse. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "../../include/esp3d_config.h"
+#if defined (GLOBAL_FILESYSTEM)
+#include "../commands.h"
+#include "../esp3doutput.h"
+#include "../settings_esp3d.h"
+#include "../../modules/authentication/authentication_service.h"
+#include "../../modules/filesystem/esp_globalFS.h"
+// Action on Global Filesystem
+//rmdir / remove / mkdir / exists /create
+//[ESP790]<Action>=<path> pwd=<admin password>
+bool Commands::ESP790(const char* cmd_params, level_authenticate_type auth_type, ESP3DOutput * output)
+{
+    bool response = true;
+    String parameter;
+    parameter = get_param (cmd_params, "");
+#ifdef AUTHENTICATION_FEATURE
+    if (auth_type != LEVEL_ADMIN) {
+        output->printERROR("Wrong authentication!", 401);
+        return false;
+    }
+#else
+    (void)auth_type;
+#endif //AUTHENTICATION_FEATURE
+    parameter = get_param (cmd_params, "mkdir=");
+    if (parameter.length() != 0) {
+        if (ESP_GBFS::mkdir(parameter.c_str())) {
+            output->printMSG ("ok");
+        } else {
+            output->printERROR ("failed!");
+            response = false;
+        }
+        return response;
+    }
+    parameter = get_param (cmd_params, "rmdir=");
+    if (parameter.length() != 0) {
+        if (ESP_GBFS::rmdir(parameter.c_str())) {
+            output->printMSG ("ok");
+        } else {
+            output->printERROR ("failed!");
+            response = false;
+        }
+        return response;
+    }
+    parameter = get_param (cmd_params, "remove=");
+    if (parameter.length() != 0) {
+        if (ESP_GBFS::remove(parameter.c_str())) {
+            output->printMSG ("ok");
+        } else {
+            output->printERROR ("failed!");
+            response = false;
+        }
+        return response;
+    }
+    parameter = get_param (cmd_params, "exists=");
+    if (parameter.length() != 0) {
+        if (ESP_GBFS::exists(parameter.c_str())) {
+            output->printMSG ("yes");
+        } else {
+            output->printMSG ("no");
+        }
+        return response;
+    }
+    parameter = get_param (cmd_params, "create=");
+    if (parameter.length() != 0) {
+        ESP_GBFile f = ESP_GBFS::open(parameter.c_str(), ESP_FILE_WRITE);
+        if (f.isOpen()) {
+            f.close();
+            output->printMSG ("ok");
+        } else {
+            output->printERROR ("failed!");
+            response = false;
+        }
+        return response;
+    }
+    output->printERROR ("Incorrect command!");
+    return false;
+}
+
+#endif //GLOBAL_FILESYSTEM
diff --git a/esp3d/src/include/defines.h b/esp3d/src/include/defines.h
index 28a3fd71..da8b624f 100644
--- a/esp3d/src/include/defines.h
+++ b/esp3d/src/include/defines.h
@@ -125,5 +125,7 @@
 #define FS_FLASH       1
 #define FS_SD          2
 #define FS_USBDISK     3
+#define FS_UNKNOWN     254
+#define MAX_FS 3
 
 #endif //_DEFINES_ESP3D_H
diff --git a/esp3d/src/include/version.h b/esp3d/src/include/version.h
index ed8a81ab..73918d28 100644
--- a/esp3d/src/include/version.h
+++ b/esp3d/src/include/version.h
@@ -22,7 +22,7 @@
 #define _VERSION_ESP3D_H
 
 //version and sources location
-#define FW_VERSION "3.0.0.a24"
+#define FW_VERSION "3.0.0.a25"
 #define REPOSITORY "https://github.com/luc-github/ESP3D"
 
 #endif //_VERSION_ESP3D_H
diff --git a/esp3d/src/modules/filesystem/esp_filesystem.h b/esp3d/src/modules/filesystem/esp_filesystem.h
index b42eb56c..5fbe7cad 100644
--- a/esp3d/src/modules/filesystem/esp_filesystem.h
+++ b/esp3d/src/modules/filesystem/esp_filesystem.h
@@ -25,7 +25,7 @@
 #include <time.h>
 #endif //FILESYSTEM_TIMESTAMP_FEATURE
 
-#define ESP_FLASH_FS_HEADER "/FS:"
+#define ESP_FLASH_FS_HEADER "/FS"
 
 #define ESP_MAX_OPENHANDLE 4
 
@@ -87,6 +87,10 @@ public:
     static bool mkdir(const char *path);
     static bool rmdir(const char *path);
     static void closeAll();
+    static bool started()
+    {
+        return _started;
+    }
 private:
     static bool _started;
 };
diff --git a/esp3d/src/modules/filesystem/esp_globalFS.cpp b/esp3d/src/modules/filesystem/esp_globalFS.cpp
new file mode 100644
index 00000000..1b0cf0f5
--- /dev/null
+++ b/esp3d/src/modules/filesystem/esp_globalFS.cpp
@@ -0,0 +1,719 @@
+/*
+  esp_globalFS.cpp - ESP3D global FS support class
+
+  Copyright (c) 2014 Luc Lebosse. All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "../../include/esp3d_config.h"
+#if defined(GLOBAL_FILESYSTEM)
+#include "esp_globalFS.h"
+#include "../../core/genLinkedList.h"
+
+
+//to verify FS is accessible
+bool ESP_GBFS::isavailable(uint8_t FS)
+{
+#ifdef FILESYSTEM_FEATURE
+    if(FS == FS_FLASH) {
+        return ESP_FileSystem::started();
+    }
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    if(FS == FS_SD) {
+        return (ESP_SD::getState(true) == ESP_SDCARD_IDLE);
+    }
+#endif //SD_DEVICE    
+    return false;
+}
+
+uint8_t ESP_GBFS::_nbFS = 0;
+String ESP_GBFS::_rootlist[MAX_FS];
+//constructor
+ESP_GBFS::ESP_GBFS()
+{
+    _nbFS = 0;
+}
+
+//destructor
+ESP_GBFS::~ESP_GBFS()
+{
+}
+
+//helper to format size to readable string
+String & ESP_GBFS::formatBytes (uint64_t bytes)
+{
+    static String res;
+    if (bytes < 1024) {
+        res = String ((uint16_t)bytes) + " B";
+    } else if (bytes < (1024 * 1024) ) {
+        res = String ((float)(bytes / 1024.0),2) + " KB";
+    } else if (bytes < (1024 * 1024 * 1024) ) {
+        res = String ((float)(bytes / 1024.0 / 1024.0),2) + " MB";
+    } else {
+        res = String ((float)(bytes / 1024.0 / 1024.0 / 1024.0),2) + " GB";
+    }
+    return res;
+}
+
+//depending FS
+uint64_t ESP_GBFS::totalBytes(uint8_t FS)
+{
+#ifdef FILESYSTEM_FEATURE
+    if(FS == FS_FLASH) {
+        return ESP_FileSystem::totalBytes();
+    }
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    if(FS == FS_SD) {
+        return ESP_SD::totalBytes();
+    }
+#endif //SD_DEVICE   
+    return 0;
+}
+
+uint64_t ESP_GBFS::usedBytes(uint8_t FS)
+{
+#ifdef FILESYSTEM_FEATURE
+    if(FS == FS_FLASH) {
+        return ESP_FileSystem::usedBytes();
+    }
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    if(FS == FS_SD) {
+        return ESP_SD::usedBytes();
+    }
+#endif //SD_DEVICE   
+    return 0;
+}
+
+uint64_t ESP_GBFS::freeBytes(uint8_t FS)
+{
+#ifdef FILESYSTEM_FEATURE
+    if(FS == FS_FLASH) {
+        return ESP_FileSystem::freeBytes();
+    }
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    if(FS == FS_SD) {
+        return ESP_SD::freeBytes();
+    }
+#endif //SD_DEVICE   
+    return 0;
+}
+
+//Format is not always available for all FS
+bool format(uint8_t FS, ESP3DOutput * output = nullptr)
+{
+#ifdef FILESYSTEM_FEATURE
+    if(FS == FS_FLASH) {
+        return ESP_FileSystem::format();
+    }
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    if(FS == FS_SD) {
+        return ESP_SD::format(output);
+    }
+#endif //SD_DEVICE 
+    output->printERROR("Not available");
+    return false;
+}
+
+//check type of FS according root dir
+uint8_t ESP_GBFS::getFSType(const char * path)
+{
+    String p = path;
+    p.trim();
+    if (p == "/") {
+        return FS_ROOT;
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (p.startsWith(ESP_FLASH_FS_HEADER)) {
+        return FS_FLASH;
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (p.startsWith(ESP_SD_FS_HEADER)) {
+        return FS_SD;
+    }
+#endif //SD_DEVICE
+    return FS_UNKNOWN;
+}
+
+const char * ESP_GBFS::getRealPath(const char * path)
+{
+    static String p;
+    uint8_t t = getFSType(path);
+    p = "";
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        p = path;
+        //remove header
+        p.remove(0,strlen(ESP_FLASH_FS_HEADER));
+        //if nothing it is root
+        if (p.length() == 0) {
+            p = "/";
+        }
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        p = path;
+        //remove header
+        p.remove(0,strlen(ESP_SD_FS_HEADER));
+        //if nothing it is root
+        if (p.length() == 0) {
+            p = "/";
+        }
+    }
+#endif //SD_DEVICE
+    return p.c_str();
+}
+
+//path exists on / or SD or FS
+bool ESP_GBFS::exists(const char* path)
+{
+
+#if defined (FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    uint8_t t = getFSType(path);
+    if (t == FS_ROOT) {
+        return true;
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        return ESP_FileSystem::exists(getRealPath(path));
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        return ESP_SD::exists(getRealPath(path));
+    }
+#endif //SD_DEVICE
+#endif // FILESYSTEM_FEATURE || SD_DEVICE
+    return false;
+}
+
+bool ESP_GBFS::remove(const char *path)
+{
+#if defined (FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    uint8_t t = getFSType(path);
+    if (t == FS_ROOT) {
+        return false;
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        return ESP_FileSystem::remove(getRealPath(path));
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        return ESP_SD::remove(getRealPath(path));
+    }
+#endif //SD_DEVICE
+#endif // FILESYSTEM_FEATURE || SD_DEVICE
+    return false;
+}
+
+bool ESP_GBFS::mkdir(const char *path)
+{
+#if defined (FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    uint8_t t = getFSType(path);
+    if (t == FS_ROOT) {
+        return false;
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        return ESP_FileSystem::mkdir(getRealPath(path));
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        return ESP_SD::mkdir(getRealPath(path));
+    }
+#endif //SD_DEVICE
+#endif // FILESYSTEM_FEATURE || SD_DEVICE
+    return false;
+}
+
+bool ESP_GBFS::rmdir(const char *path)
+{
+#if defined (FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    uint8_t t = getFSType(path);
+    if (t == FS_ROOT) {
+        return false;
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        return ESP_FileSystem::rmdir(getRealPath(path));
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        return ESP_SD::rmdir(getRealPath(path));
+    }
+#endif //SD_DEVICE
+#endif // FILESYSTEM_FEATURE || SD_DEVICE
+    return false;
+}
+
+void ESP_GBFS::closeAll()
+{
+    getNextFS(true);
+#if defined (FILESYSTEM_FEATURE)
+    ESP_FileSystem::closeAll();
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    ESP_SD::closeAll();
+#endif //SD_DEVICE
+}
+
+ESP_GBFile ESP_GBFS::open(const char* path, uint8_t mode)
+{
+    ESP_GBFile f;
+#if defined (FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    uint8_t t = getFSType(path);
+    if ((t == FS_ROOT) &&  (mode == ESP_FILE_READ)) {
+        f = ESP_GBFile(FS_ROOT);
+        //reset index;
+        getNextFS(true);
+    }
+#if defined (FILESYSTEM_FEATURE)
+    if (t == FS_FLASH) {
+        f = ESP_FileSystem::open(getRealPath(path), mode);
+    }
+#endif //FILESYSTEM_FEATURE
+#if defined (SD_DEVICE)
+    if (t == FS_SD) {
+        f = ESP_SD::open(getRealPath(path), mode);
+    }
+#endif //SD_DEVICE
+#endif // FILESYSTEM_FEATURE || SD_DEVICE
+    return f;
+}
+
+
+//Default File is no file
+ESP_GBFile::ESP_GBFile()
+{
+    _type = FS_UNKNOWN;
+}
+
+//File handle for the root
+ESP_GBFile::ESP_GBFile(uint8_t FS)
+{
+    _type = FS;
+}
+
+//Handle for flash file
+#ifdef FILESYSTEM_FEATURE
+ESP_GBFile::ESP_GBFile(ESP_File & flashFile)
+{
+    _type = FS_FLASH;
+    _flashFile = flashFile;
+#ifdef SD_DEVICE
+    _sdFile = ESP_SDFile();
+#endif //SD_DEVICE 
+}
+#endif //FILESYSTEM_FEATURE
+
+//Handle for SD file
+#ifdef SD_DEVICE
+ESP_GBFile::ESP_GBFile(ESP_SDFile & sdFile)
+{
+    _type = FS_SD;
+    _sdFile = sdFile;
+#ifdef FILESYSTEM_FEATURE
+    _flashFile = ESP_File();
+#endif //FILESYSTEM_FEATURE
+}
+#endif //SD_DEVICE
+
+//Destructor
+ESP_GBFile::~ESP_GBFile()
+{
+}
+
+ESP_GBFile::operator bool() const
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return true;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile;
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile;
+    }
+#endif //SD_DEVICE 
+    return false;
+}
+
+void ESP_GBFile::close()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        //TBD
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        _flashFile.close();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.close();
+    }
+#endif //SD_DEVICE 
+}
+
+bool ESP_GBFile::isOpen()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return true;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.isOpen();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.isOpen();
+    }
+#endif //SD_DEVICE 
+    return false;
+}
+
+const char* ESP_GBFile::name() const
+{
+    static String s;
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return "/";
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        if (strcmp(_flashFile.name(), "/") == 0) {
+            s = ESP_FLASH_FS_HEADER;
+            s.remove(0,1);
+            return s.c_str();
+        }
+        return _flashFile.name();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        if (strcmp(_sdFile.name(), "/") == 0) {
+            s = ESP_SD_FS_HEADER;
+            s.remove(0,1);
+            return s.c_str();
+        }
+        return _sdFile.name();
+    }
+#endif //SD_DEVICE
+    return "";
+}
+
+const char* ESP_GBFile::filename() const
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    static String s;
+    if (_type == FS_ROOT) {
+        return "/";
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        s = ESP_FLASH_FS_HEADER;
+        s += _flashFile.filename();
+        return s.c_str();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        s = ESP_SD_FS_HEADER;
+        s += s += _sdFile.filename();
+        return s.c_str();
+    }
+#endif //SD_DEVICE
+    return "";
+}
+
+bool ESP_GBFile::isDirectory()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return true;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.isDirectory();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.isDirectory();
+    }
+#endif //SD_DEVICE
+    return false;
+}
+
+size_t ESP_GBFile::size()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return 0;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.size();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.size();
+    }
+#endif //SD_DEVICE
+    return 0;
+}
+
+#if defined (SD_TIMESTAMP_FEATURE) || defined(FILESYSTEM_TIMESTAMP_FEATURE)
+time_t ESP_GBFile::getLastWrite()
+{
+#if defined(FILESYSTEM_FEATURE) && defined(FILESYSTEM_TIMESTAMP_FEATURE)
+    if (_type == FS_FLASH) {
+        return _flashFile.getLastWrite();
+    }
+#endif //FILESYSTEM_FEATURE && FILESYSTEM_TIMESTAMP_FEATURE
+#if defined(SD_DEVICE) && defined(SD_TIMESTAMP_FEATURE)
+    if (_type == FS_SD) {
+        return _sdFile.getLastWrite();
+    }
+#endif //SD_DEVICE && SD_TIMESTAMP_FEATURE
+    return 0;
+}
+#endif //SD_TIMESTAMP_FEATURE || FILESYSTEM_TIMESTAMP_FEATURE
+
+int ESP_GBFile::available()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return 0;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.available();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.available();
+    }
+#endif //SD_DEVICE
+    return 0;
+}
+
+size_t ESP_GBFile::write(uint8_t i)
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return 0;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.write(i);
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.write(i);
+    }
+#endif //SD_DEVICE
+    return 0;
+}
+
+size_t ESP_GBFile::write(const uint8_t *buf, size_t size)
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return 0;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.write(buf, size);
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.write(buf, size);
+    }
+#endif //SD_DEVICE
+    return 0;
+}
+
+int ESP_GBFile::read()
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return -1;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.read();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.read();
+    }
+#endif //SD_DEVICE
+    return -1;
+}
+
+size_t ESP_GBFile::read(uint8_t* buf, size_t size)
+{
+#if defined(FILESYSTEM_FEATURE) || defined(SD_DEVICE)
+    if (_type == FS_ROOT) {
+        return -1;
+    }
+#endif //FILESYSTEM_FEATURE || SD_DEVICE
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.read(buf, size);
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.read(buf, size);
+    }
+#endif //SD_DEVICE
+    return -1;
+}
+
+void ESP_GBFile::flush()
+{
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        return _flashFile.flush();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        return _sdFile.flush();
+    }
+#endif //SD_DEVICE
+    return ;
+}
+
+ESP_GBFile& ESP_GBFile::operator=(const ESP_GBFile & other)
+{
+#ifdef FILESYSTEM_FEATURE
+    _flashFile = other._flashFile;
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    _sdFile = other._sdFile;
+#endif //SD_DEVICE 
+    _type = other._type;
+    return *this;
+}
+
+#ifdef FILESYSTEM_FEATURE
+ESP_GBFile & ESP_GBFile::operator=(const ESP_File & other)
+{
+    _flashFile = other;
+#ifdef SD_DEVICE
+    _sdFile = ESP_SDFile();
+#endif //SD_DEVICE 
+    _type = FS_FLASH;
+    return *this;
+}
+#endif //FILESYSTEM_FEATURE    
+#ifdef SD_DEVICE
+ESP_GBFile & ESP_GBFile::operator=(const ESP_SDFile & other)
+{
+#ifdef FILESYSTEM_FEATURE
+    _flashFile = ESP_File();
+#endif //FILESYSTEM_FEATURE 
+    _sdFile = other;
+    _type = FS_SD;
+    return *this;
+}
+#endif //SD_DEVICE   
+
+const char * ESP_GBFS::getNextFS(bool reset)
+{
+    static uint8_t index = 0;
+    if (reset) {
+        index = 0;
+        if(_nbFS == 0) {
+#ifdef FILESYSTEM_FEATURE
+            _rootlist[_nbFS] = ESP_FLASH_FS_HEADER;
+            _nbFS++;
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+            _rootlist[_nbFS] = ESP_SD_FS_HEADER;
+            _nbFS++;
+#endif //SD_DEVICE 
+        }
+        return "";
+    }
+    if (index < _nbFS) {
+        uint8_t i = index;
+        index++;
+        return _rootlist[i].c_str();
+    }
+    return "";
+}
+
+ESP_GBFile ESP_GBFile::openNextFile()
+{
+    ESP_GBFile f;
+    if (_type == FS_ROOT) {
+        String path = ESP_GBFS::getNextFS();
+        if (path.length() > 0) {
+            f = ESP_GBFS::open(path.c_str());
+            f.close();
+        }
+    }
+#ifdef FILESYSTEM_FEATURE
+    if (_type == FS_FLASH) {
+        f = _flashFile.openNextFile();
+    }
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    if (_type == FS_SD) {
+        f = _sdFile.openNextFile();
+    }
+#endif //SD_DEVICE 
+    return f;
+}
+
+#endif //GLOBAL_FILESYSTEM
diff --git a/esp3d/src/modules/filesystem/esp_globalFS.h b/esp3d/src/modules/filesystem/esp_globalFS.h
new file mode 100644
index 00000000..2c83b547
--- /dev/null
+++ b/esp3d/src/modules/filesystem/esp_globalFS.h
@@ -0,0 +1,110 @@
+/*
+  esp_globalFS.h - ESP3D FS support class
+
+  Copyright (c) 2014 Luc Lebosse. All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef _ESP_GLOBAL_FS_H
+#define _ESP_GLOBAL_FS_H
+#include "../../include/esp3d_config.h"
+#include "../../core/esp3doutput.h"
+#if defined(SD_TIMESTAMP_FEATURE) || defined(FILESYSTEM_TIMESTAMP_FEATURE)
+#include <time.h>
+#endif //SD_TIMESTAMP_FEATURE || FILESYSTEM_TIMESTAMP_FEATURE
+#ifdef FILESYSTEM_FEATURE
+#include "esp_filesystem.h"
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+#include "esp_sd.h"
+#endif //SD_DEVICE
+
+
+class ESP_GBFile
+{
+public:
+    ESP_GBFile();
+    ESP_GBFile(uint8_t FS);
+#ifdef FILESYSTEM_FEATURE
+    ESP_GBFile(ESP_File & flashFile);
+#endif //FILESYSTEM_FEATURE
+#ifdef SD_DEVICE
+    ESP_GBFile(ESP_SDFile & sdFile);
+#endif //SD_DEVICE
+    ~ESP_GBFile();
+    operator bool() const;
+    bool isDirectory();
+    const char* name() const;
+    const char* shortname() const;
+    const char* filename() const;
+    void close();
+    bool isOpen();
+    ESP_GBFile & operator=(const ESP_GBFile & other);
+#ifdef FILESYSTEM_FEATURE
+    ESP_GBFile & operator=(const ESP_File & other);
+#endif //FILESYSTEM_FEATURE    
+#ifdef SD_DEVICE
+    ESP_GBFile & operator=(const ESP_SDFile & other);
+#endif //SD_DEVICE    
+    size_t size();
+#if defined (SD_TIMESTAMP_FEATURE) || defined(FILESYSTEM_TIMESTAMP_FEATURE)
+    time_t getLastWrite();
+#endif //SD_TIMESTAMP_FEATURE || FILESYSTEM_TIMESTAMP_FEATURE
+    int available();
+    size_t write(uint8_t i);
+    size_t write(const uint8_t *buf, size_t size);
+    int read();
+    size_t read(uint8_t* buf, size_t size);
+    void flush();
+    ESP_GBFile openNextFile();
+private:
+
+#ifdef FILESYSTEM_FEATURE
+    ESP_File _flashFile;
+#endif //FILESYSTEM_FEATURE 
+#ifdef SD_DEVICE
+    ESP_SDFile _sdFile;
+#endif //SD_DEVICE 
+    uint8_t _type;
+};
+
+class ESP_GBFS
+{
+public:
+    ESP_GBFS();
+    ~ESP_GBFS();
+    static bool isavailable(uint8_t FS);
+    static uint64_t totalBytes(uint8_t FS);
+    static uint64_t usedBytes(uint8_t FS);
+    static uint64_t freeBytes(uint8_t FS);
+    static bool format(uint8_t FS, ESP3DOutput * output = nullptr);
+    static ESP_GBFile open(const char* path, uint8_t mode = ESP_FILE_READ);
+    static bool exists(const char* path);
+    static bool remove(const char *path);
+    static bool mkdir(const char *path);
+    static bool rmdir(const char *path);
+    static void closeAll();
+    static String & formatBytes (uint64_t bytes);
+    static const char * getNextFS(bool reset = false);
+    static uint8_t getFSType(const char * path);
+private:
+    static const char * getRealPath(const char * path);
+    static uint8_t _nbFS;
+    static String _rootlist[MAX_FS];
+};
+
+
+#endif //_ESP_GLOBAL_FS_H
diff --git a/esp3d/src/modules/filesystem/esp_sd.h b/esp3d/src/modules/filesystem/esp_sd.h
index c22b01ff..67ab3c15 100644
--- a/esp3d/src/modules/filesystem/esp_sd.h
+++ b/esp3d/src/modules/filesystem/esp_sd.h
@@ -26,7 +26,7 @@
 #include <time.h>
 #endif //SD_TIMESTAMP_FEATURE
 
-#define ESP_SD_HEADER "/SD:"
+#define ESP_SD_FS_HEADER "/SD"
 
 #define ESP_MAX_SD_OPENHANDLE 4
 
diff --git a/esp3d/src/modules/filesystem/sd/sd_native_esp32.cpp b/esp3d/src/modules/filesystem/sd/sd_native_esp32.cpp
index ed6e28e8..521d4039 100644
--- a/esp3d/src/modules/filesystem/sd/sd_native_esp32.cpp
+++ b/esp3d/src/modules/filesystem/sd/sd_native_esp32.cpp
@@ -239,6 +239,9 @@ ESP_SDFile::ESP_SDFile(void* handle, bool isdir, bool iswritemode, const char *
             if (pos != -1) {
                 _name.remove( 0, pos+1);
             }
+            if (_name.length() == 0) {
+                _name = "/";
+            }
             //size
             _size = tSDFile_handle[i].size();
             //time
diff --git a/esp3d/src/modules/filesystem/sd/sd_native_esp8266.cpp b/esp3d/src/modules/filesystem/sd/sd_native_esp8266.cpp
index cb4969fa..3a20d284 100644
--- a/esp3d/src/modules/filesystem/sd/sd_native_esp8266.cpp
+++ b/esp3d/src/modules/filesystem/sd/sd_native_esp8266.cpp
@@ -726,6 +726,9 @@ ESP_SDFile::ESP_SDFile(void* handle, bool isdir, bool iswritemode, const char *
             if (pos != -1) {
                 _name.remove( 0, pos+1);
             }
+            if (_name.length() == 0) {
+                _name = "/";
+            }
             //size
             _size = tSDFile_handle[i].size();
             //time
diff --git a/esp3d/src/modules/filesystem/sd/sd_sdfat_esp32.cpp b/esp3d/src/modules/filesystem/sd/sd_sdfat_esp32.cpp
index abe72c67..b8b8ad84 100644
--- a/esp3d/src/modules/filesystem/sd/sd_sdfat_esp32.cpp
+++ b/esp3d/src/modules/filesystem/sd/sd_sdfat_esp32.cpp
@@ -725,6 +725,9 @@ ESP_SDFile::ESP_SDFile(void* handle, bool isdir, bool iswritemode, const char *
             if (pos != -1) {
                 _name.remove( 0, pos+1);
             }
+            if (_name.length() == 0) {
+                _name = "/";
+            }
             //size
             _size = tSDFile_handle[i].size();
             //time
diff --git a/esp3d/src/modules/filesystem/sd/sdio_esp32.cpp b/esp3d/src/modules/filesystem/sd/sdio_esp32.cpp
index 376d3e56..699bda0f 100644
--- a/esp3d/src/modules/filesystem/sd/sdio_esp32.cpp
+++ b/esp3d/src/modules/filesystem/sd/sdio_esp32.cpp
@@ -228,6 +228,9 @@ ESP_SDFile::ESP_SDFile(void* handle, bool isdir, bool iswritemode, const char *
             if (pos != -1) {
                 _name.remove( 0, pos+1);
             }
+            if (_name.length() == 0) {
+                _name = "/";
+            }
             //size
             _size = tSDFile_handle[i].size();
             //time