diff --git a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.cpp b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.cpp
index bea07abdef5..31405c9d775 100644
--- a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.cpp
+++ b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.cpp
@@ -170,6 +170,11 @@ wiced_result_t wiced_filesystem_mount(BlockDevice *device, wiced_filesystem_hand
     return WICED_ERROR;
 }
 
+wiced_result_t wiced_filesystem_mount_default(void)
+{
+    return wiced_filesystem_mount(mbr_bd, 0, &resource_fs_handle, WIFI_DEFAULT_MOUNT_NAME);
+}
+
 wiced_result_t wiced_filesystem_file_open(wiced_filesystem_t *fs_handle, wiced_file_t *file_handle_out, const char *filename, wiced_filesystem_open_mode_t mode)
 {
     /* This is called by mbed test system */
diff --git a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.h b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.h
index a65aa3c1489..77d49d18202 100644
--- a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.h
+++ b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H747xI/TARGET_PORTENTA_H7/COMPONENT_WHD/port/wiced_filesystem.h
@@ -81,6 +81,15 @@ typedef int wiced_filesystem_handle_type_t;
  */
 wiced_result_t wiced_filesystem_init(void);
 
+/**
+ * Mount the physical device using default parameters
+ *
+ * This assumes that the device is ready to read/write immediately.
+ *
+ * @return WICED_SUCCESS on success
+ */
+wiced_result_t wiced_filesystem_mount_default(void);
+
 /**
  * Open a file for reading or writing
  *