diff --git a/src/Arduino_Portenta_OTA_QSPI.cpp b/src/Arduino_Portenta_OTA_QSPI.cpp
index 44adaed..0daed90 100644
--- a/src/Arduino_Portenta_OTA_QSPI.cpp
+++ b/src/Arduino_Portenta_OTA_QSPI.cpp
@@ -25,10 +25,6 @@
 
 using namespace arduino;
 
-#if defined (COMPONENT_4343W_FS)
-extern QSPIFBlockDevice *qspi_bd;
-#endif
-
 /******************************************************************************
    CTOR/DTOR
  ******************************************************************************/
@@ -47,13 +43,7 @@ Arduino_Portenta_OTA_QSPI::Arduino_Portenta_OTA_QSPI(StorageTypePortenta const s
 
 bool Arduino_Portenta_OTA_QSPI::init()
 {
-#if !defined (COMPONENT_4343W_FS)
-  qspi_bd = new QSPIFBlockDevice(PD_11, PD_12, PF_7, PD_13,  PF_10, PG_6, QSPIF_POLARITY_MODE_1, 40000000);
-  if (qspi_bd->init() != QSPIF_BD_ERROR_OK) {
-    Serial1.println("Error: QSPI init failure.");
-    return false;
-  }
-#endif
+  auto qspi_bd = mbed::BlockDevice::get_default_instance();
 
   if(_storage_type == QSPI_FLASH_FATFS)
   {
diff --git a/src/Arduino_Portenta_OTA_QSPI.h b/src/Arduino_Portenta_OTA_QSPI.h
index a16ce63..69c6f83 100644
--- a/src/Arduino_Portenta_OTA_QSPI.h
+++ b/src/Arduino_Portenta_OTA_QSPI.h
@@ -47,10 +47,6 @@ class Arduino_Portenta_OTA_QSPI : public Arduino_Portenta_OTA
 
   mbed::BlockDevice * _bd_qspi;
   mbed::FATFileSystem * _fs_qspi;
-#if !defined (COMPONENT_4343W_FS)
-  QSPIFBlockDevice *qspi_bd;
-#endif
-
 };
 
 #endif /* ARDUINO_PORTENTA_OTA_QSPI_H_ */