diff --git a/hardware/arduino/avr/libraries/Bridge/Bridge.cpp b/hardware/arduino/avr/libraries/Bridge/Bridge.cpp
index 266905c96..4787cb911 100644
--- a/hardware/arduino/avr/libraries/Bridge/Bridge.cpp
+++ b/hardware/arduino/avr/libraries/Bridge/Bridge.cpp
@@ -105,53 +105,6 @@ void BridgeClass::writeCommandInput(uint8_t handle,
   transfer(cmd, 2, buff, size, NULL, 0);
 }
 
-uint8_t BridgeClass::fileOpen(String &file, uint8_t mode, uint8_t &err) {
-  uint8_t cmd[] = {'F', mode};
-  uint8_t res[2];
-  transfer(cmd, 2, (uint8_t*)file.c_str(), file.length(), res, 2);
-  err = res[0];
-  return res[1];
-}
-
-void BridgeClass::fileClose(uint8_t handle) {
-  uint8_t cmd[] = {'f', handle};
-  transfer(cmd, 2);
-}
-
-unsigned int BridgeClass::fileRead(uint8_t handle, uint8_t *buff, unsigned int size, uint8_t &err) {
-  uint8_t s = size > 255 ? 255 : size-1;
-  uint8_t cmd[] = {'G', handle, s};
-  uint8_t l = transfer(cmd, 3, buff, size) - 1;
-  err = buff[0]; // First byte is error code
-  if (l>0) {
-    // Shift the reminder of buffer
-    for (uint8_t i=0; i<l; i++)
-      buff[i] = buff[i+1];
-  }
-  return l;
-}
-
-void BridgeClass::fileWrite(uint8_t handle, const uint8_t *buff, unsigned int size, uint8_t &err) {
-  uint8_t cmd[] = {'g', handle};
-  uint8_t res[1];
-  transfer(cmd, 2, buff, size, res, 1);
-  err = res[0];
-}
-
-void BridgeClass::fileSeek(uint8_t handle, uint32_t position, uint8_t &err) {
-  uint8_t cmd[] = {
-    's',
-    handle,
-    (position >> 24) & 0xFF,
-    (position >> 16) & 0xFF,
-    (position >> 8) & 0xFF,
-    position & 0xFF
-  };
-  uint8_t res[1];
-  transfer(cmd, 6, res, 1);
-  err = res[0];
-}
-
 unsigned int BridgeClass::readMessage(uint8_t *buff, unsigned int size) {
   uint8_t tmp[] = { 'm' };
   return transfer(tmp, 1, buff, size);
@@ -204,7 +157,7 @@ bool BridgeClass::crcCheck(uint16_t _CRC) {
   return CRC == _CRC;
 }
 
-uint8_t BridgeClass::transfer(const uint8_t *buff1, uint16_t len1,
+uint16_t BridgeClass::transfer(const uint8_t *buff1, uint16_t len1,
                  const uint8_t *buff2, uint16_t len2,
                  const uint8_t *buff3, uint16_t len3,
                  uint8_t *rxbuff, uint16_t rxlen)
diff --git a/hardware/arduino/avr/libraries/Bridge/Bridge.h b/hardware/arduino/avr/libraries/Bridge/Bridge.h
index 6e54bbd64..0c8617563 100644
--- a/hardware/arduino/avr/libraries/Bridge/Bridge.h
+++ b/hardware/arduino/avr/libraries/Bridge/Bridge.h
@@ -42,20 +42,6 @@ public:
   void writeCommandInput(uint8_t handle, const char *buff, unsigned int size)
     { writeCommandInput(handle, reinterpret_cast<const uint8_t *>(buff), size); }
   
-  // Methods to handle files
-  uint8_t fileOpen(String &file, uint8_t mode, uint8_t &err);
-  void fileClose(uint8_t handle);
-
-  unsigned int fileRead(uint8_t handle, uint8_t *buff, unsigned int size, uint8_t &err);
-  unsigned int fileRead(uint8_t handle, char *buff, unsigned int size, uint8_t &err)
-    { return fileRead(handle, reinterpret_cast<uint8_t *>(buff), size, err); }
-
-  void fileWrite(uint8_t handle, const uint8_t *buff, unsigned int size, uint8_t &err);
-  void fileWrite(uint8_t handle, const char *buff, unsigned int size, uint8_t &err)
-    { fileWrite(handle, reinterpret_cast<const uint8_t *>(buff), size, err); }
-
-  void fileSeek(uint8_t handle, uint32_t position, uint8_t &err);
-
   // Methods to handle mailbox messages
   unsigned int readMessage(uint8_t *buffer, unsigned int size);
   void writeMessage(const uint8_t *buffer, unsigned int size);
@@ -79,20 +65,20 @@ public:
   void flush() { stream.flush(); }
 
   // Trasnfer a frame (with error correction and response)
-  uint8_t transfer(const uint8_t *buff1, uint16_t len1,
+  uint16_t transfer(const uint8_t *buff1, uint16_t len1,
                    const uint8_t *buff2, uint16_t len2,
                    const uint8_t *buff3, uint16_t len3,
                    uint8_t *rxbuff, uint16_t rxlen);
   // multiple inline versions of the same function to allow efficient frame concatenation
-  uint8_t transfer(const uint8_t *buff1, uint16_t len1)
-  { transfer(buff1, len1, NULL, 0); }
-  uint8_t transfer(const uint8_t *buff1, uint16_t len1,
+  uint16_t transfer(const uint8_t *buff1, uint16_t len1)
+  { return transfer(buff1, len1, NULL, 0); }
+  uint16_t transfer(const uint8_t *buff1, uint16_t len1,
                    uint8_t *rxbuff, uint16_t rxlen)
-  { transfer(buff1, len1, NULL, 0, rxbuff, rxlen); }
-  uint8_t transfer(const uint8_t *buff1, uint16_t len1,
+  { return transfer(buff1, len1, NULL, 0, rxbuff, rxlen); }
+  uint16_t transfer(const uint8_t *buff1, uint16_t len1,
                    const uint8_t *buff2, uint16_t len2,
                    uint8_t *rxbuff, uint16_t rxlen)
-  { transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen); }
+  { return transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen); }
 private:
   uint8_t index;
   int timedRead(unsigned int timeout);
diff --git a/hardware/arduino/avr/libraries/Bridge/FileIO.cpp b/hardware/arduino/avr/libraries/Bridge/FileIO.cpp
index 04abc0dd2..bd8f48729 100644
--- a/hardware/arduino/avr/libraries/Bridge/FileIO.cpp
+++ b/hardware/arduino/avr/libraries/Bridge/FileIO.cpp
@@ -24,11 +24,15 @@ File::File(BridgeClass &b) : mode(255), bridge(b) {
 
 File::File(const char *_filename, uint8_t _mode, BridgeClass &b) : mode(_mode), bridge(b) {
   filename = _filename;
-  uint8_t err;
   char modes[] = {'r','w','a'};
-  handle = bridge.fileOpen(filename, modes[mode], err);
-  if (err != 0)
+  uint8_t cmd[] = {'F', modes[mode]};
+  uint8_t res[2];
+  bridge.transfer(cmd, 2, (uint8_t*)filename.c_str(), filename.length(), res, 2);
+  if (res[0] != 0) { // res[0] contains error code
     mode = 255; // In case of error keep the file closed
+    return;
+  }
+  handle = res[1];
   buffered = 0;
 }
 
@@ -47,10 +51,11 @@ size_t File::write(uint8_t c) {
 size_t File::write(const uint8_t *buf, size_t size) {
   if (mode == 255)
 	return -1;
-  uint8_t err;
-  bridge.fileWrite(handle, buf, size, err);
-  if (err != 0)
-	return -err;
+  uint8_t cmd[] = {'g', handle};
+  uint8_t res[1];
+  bridge.transfer(cmd, 2, buf, size, res, 1);
+  if (res[0] != 0) // res[0] contains error code
+	return -res[0];
   return size;
 }
 
@@ -72,10 +77,23 @@ int File::peek() {
     return buffer[readPos];
 }
 
-boolean File::seek(uint32_t pos) {
-  uint8_t err;
-  bridge.fileSeek(handle, pos, err);
-  return err==0;
+boolean File::seek(uint32_t position) {
+  uint8_t cmd[] = {
+    's',
+    handle,
+    (position >> 24) & 0xFF,
+    (position >> 16) & 0xFF,
+    (position >> 8) & 0xFF,
+    position & 0xFF
+  };
+  uint8_t res[1];
+  bridge.transfer(cmd, 6, res, 1);
+  if (res[0]==0) {
+    // If seek succeed then flush buffers
+    buffered = 0;
+    return true;
+  }
+  return false;
 }
 
 void File::doBuffer() {
@@ -85,8 +103,14 @@ void File::doBuffer() {
 
   // Try to buffer up to 32 characters
   readPos = 0;
-  uint8_t err;
-  buffered = bridge.fileRead(handle, buffer, sizeof(buffer), err);
+  uint8_t cmd[] = {'G', handle, sizeof(buffer)};
+  buffered = bridge.transfer(cmd, 3, buffer, sizeof(buffer)) - 1;
+  //err = buff[0]; // First byte is error code
+  if (buffered>0) {
+    // Shift the reminder of buffer
+    for (uint8_t i=0; i<buffered; i++)
+      buffer[i] = buffer[i+1];
+  }
 }
 
 int File::available() {
@@ -99,13 +123,15 @@ void File::flush() {
 }
 
 //int read(void *buf, uint16_t nbyte)
+
 //uint32_t position()
 //uint32_t size()
 
 void File::close() {
   if (mode == 255)
     return;
-  bridge.fileClose(handle);
+  uint8_t cmd[] = {'f', handle};
+  bridge.transfer(cmd, 2);
   mode = 255;
 }
 
@@ -127,14 +153,7 @@ boolean SDClass::begin() {
 }
 
 File SDClass::open(const char *filename, uint8_t mode) {
-//  if (mode == FILE_READ) {
-//    if (exists(filename))
-//      return File(filename, mode);
-//  }
-//  if (mode == FILE_WRITE || mode == FILE_APPEND) {
-    return File(filename, mode);
-//  }
-//  return File();
+  return File(filename, mode);
 }
 
 boolean SDClass::exists(const char *filepath) {