diff --git a/Grbl_Esp32/commands.cpp b/Grbl_Esp32/commands.cpp
index 1c7dff63..e1e69964 100644
--- a/Grbl_Esp32/commands.cpp
+++ b/Grbl_Esp32/commands.cpp
@@ -875,12 +875,64 @@ bool COMMANDS::execute_internal_command (int cmd, String cmd_params, level_authe
             int8_t state = get_sd_state(true);
             if (state  ==  SDCARD_IDLE) {
                 listDir(SD, "/", 10, espresponse->client());
+                String ssd = "[SD Free:" + ESPResponseStream::formatBytes(SD.totalBytes() - SD.usedBytes());
+                ssd +=" Used:" + ESPResponseStream::formatBytes(SD.usedBytes());
+                ssd +=" Total:" + ESPResponseStream::formatBytes(SD.totalBytes());
+                ssd +="]";
                 espresponse->println ("");
+                espresponse->println (ssd.c_str());
                 }
             else espresponse->println ((state == SDCARD_NOT_PRESENT) ? "No SD card" : "Busy");
             }
             break;
             
+        //Delete SD Card file / directory
+        //[ESP215]<file/dir name>pwd=<user/admin password>
+        case 215:
+            {
+            if (!espresponse) return false;
+#ifdef ENABLE_AUTHENTICATION
+            if (auth_type == LEVEL_GUEST) {
+                espresponse->println ("Error: Wrong authentication!");
+                return false;
+                
+            }
+#endif      
+            parameter = get_param (cmd_params, "", true);
+            if (parameter.length() != 0) {
+                int8_t state = get_sd_state(true);
+                parameter.trim();
+                if (parameter[0] != '/'){
+                    parameter = "/" + parameter;
+                }
+                if (state  ==  SDCARD_IDLE) {
+                    File file2del = SD.open(parameter.c_str());
+                    if (file2del) {
+                        if (file2del.isDirectory()) {
+                            if (!SD.rmdir((char *)parameter.c_str())) {
+                                espresponse->println ("Error: Cannot delete directory! Is directory empty?");
+                            } else {
+                                 espresponse->println ("Directory deleted.");
+                            }
+                        } else {
+                            if (!SD.remove((char *)parameter.c_str())) {
+                                espresponse->println ("Error: Cannot delete file!");
+                            } else {
+                                espresponse->println ("File deleted.");
+                            } 
+                            }
+                    } else {
+                        espresponse->println ("Error: Cannot stat file!");
+                    }
+                    file2del.close();
+                } else {
+                    espresponse->println ((state == SDCARD_NOT_PRESENT) ? "No SD card" : "Busy");
+                    }
+                } else {
+                    espresponse->println ("Error: Missing file name!");
+                }
+            }
+            break;
         //print SD file
         //[ESP220]<filename>
         case 220:
diff --git a/Grbl_Esp32/cpu_map.h b/Grbl_Esp32/cpu_map.h
index de56ae2f..ab1f8fed 100644
--- a/Grbl_Esp32/cpu_map.h
+++ b/Grbl_Esp32/cpu_map.h
@@ -36,6 +36,14 @@
 	
 	*/
 		
+//Set your pine definition 
+//let -1 to use default board pin
+#define GRBL_SPI_SS -1
+#define GRBL_SPI_MOSI -1
+#define GRBL_SPI_MISO -1
+#define GRBL_SPI_SCK -1
+//Set you frequency 
+#define GRBL_SPI_FREQ  4000000
 
 #ifdef CPU_MAP_ESP32
 	// This is the CPU Map for the ESP32 CNC Controller R2	
diff --git a/Grbl_Esp32/grbl.h b/Grbl_Esp32/grbl.h
index b78a1e7e..586286b2 100644
--- a/Grbl_Esp32/grbl.h
+++ b/Grbl_Esp32/grbl.h
@@ -20,7 +20,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "1.1f"
-#define GRBL_VERSION_BUILD "20190708"
+#define GRBL_VERSION_BUILD "20190829"
 
 //#include <sdkconfig.h>
 #include <Arduino.h>
diff --git a/Grbl_Esp32/grbl_sd.cpp b/Grbl_Esp32/grbl_sd.cpp
index 550bb246..a843dc1b 100644
--- a/Grbl_Esp32/grbl_sd.cpp
+++ b/Grbl_Esp32/grbl_sd.cpp
@@ -200,7 +200,7 @@ uint8_t get_sd_state(bool refresh)
     sd_state = SDCARD_NOT_PRESENT;
     //using default value for speed ? should be parameter
     //refresh content if card was removed
-    if (SD.begin()) {
+    if (SD.begin((GRBL_SPI_SS == -1)?SS:GRBL_SPI_SS, SPI, GRBL_SPI_FREQ)) {
       if ( SD.cardSize() > 0 )sd_state = SDCARD_IDLE;
     }
   return sd_state;
diff --git a/Grbl_Esp32/system.cpp b/Grbl_Esp32/system.cpp
index f842f3f6..5666c284 100644
--- a/Grbl_Esp32/system.cpp
+++ b/Grbl_Esp32/system.cpp
@@ -44,6 +44,10 @@ void system_ini() // Renamed from system_init() due to conflict with esp32 files
 	#endif
 
 #endif
+   //customize pin definition if needed
+#if (GRBL_SPI_SS != -1) || (GRBL_SPI_MISO != -1) || (GRBL_SPI_MOSI != -1) || (GRBL_SPI_SCK != -1)
+    SPI.begin(GRBL_SPI_SCK, GRBL_SPI_MISO, GRBL_SPI_MOSI, GRBL_SPI_SS);
+#endif 
 }
 
 void IRAM_ATTR isr_control_inputs()
diff --git a/Grbl_Esp32/web_server.cpp b/Grbl_Esp32/web_server.cpp
index 1e09d9b3..a4d4933a 100644
--- a/Grbl_Esp32/web_server.cpp
+++ b/Grbl_Esp32/web_server.cpp
@@ -1366,19 +1366,20 @@ void Web_Server::handle_direct_SDFileList()
     }
     jsonfile+="],\"path\":\"";
     jsonfile+=path + "\",";
-    static uint32_t volTotal = 1;
-    static uint32_t volFree = 0;
     jsonfile+="\"total\":\"";
     String stotalspace,susedspace;
     //SDCard are in GB or MB but no less
     totalspace = SD.totalBytes();
     usedspace = SD.usedBytes();
     stotalspace = ESPResponseStream::formatBytes(totalspace);
-    susedspace =  ESPResponseStream::formatBytes(usedspace);
+    susedspace =  ESPResponseStream::formatBytes(usedspace+1);
 
-    uint32_t  occupedspace = (volFree/volTotal)*100;
+    uint32_t  occupedspace = 1;
+    uint32_t  usedspace2 = usedspace/(1024*1024);
+    uint32_t  totalspace2 = totalspace/(1024*1024);
+    occupedspace = (usedspace2 * 100)/totalspace2;
     //minimum if even one byte is used is 1%
-    if ( (occupedspace <= 1) && (volTotal!=volFree)) {
+    if ( occupedspace <= 1) {
         occupedspace=1;
     }
     if (totalspace) {
diff --git a/doc/Commands.txt b/doc/Commands.txt
index c9705b30..2071a42b 100644
--- a/doc/Commands.txt
+++ b/doc/Commands.txt
@@ -85,6 +85,9 @@ Reply: 81
 * Get SD Card Content
 [ESP210] pwd=<user/admin password>
 
+* Delete SD Card file / directory
+[ESP215]<file/dir name>pwd=<user/admin password>
+
 * Print SD file
 [ESP220] <Filename> pwd=<user/admin password>