diff --git a/os/ex/subsystems/mfs/mfs.c b/os/ex/subsystems/mfs/mfs.c
index 00488db1c..fe5960ad5 100644
--- a/os/ex/subsystems/mfs/mfs.c
+++ b/os/ex/subsystems/mfs/mfs.c
@@ -90,7 +90,7 @@ void mfsStart(MFSDriver *devp, const MFSConfig *config) {
 /**
  * @brief   Deactivates a MFS driver.
  *
- * @param[in] devp       pointer to the @p MFSDriver object
+ * @param[in] devp      pointer to the @p MFSDriver object
  *
  * @api
  */
@@ -105,4 +105,89 @@ void mfsStop(MFSDriver *devp) {
   }
 }
 
+/**
+ * @brief   Mounts a managed flash storage.
+ * @details This functions checks the storage internal state and eventually
+ *          performs the required initialization or repair operations.
+ *
+ * @param[in] devp      pointer to the @p MFSDriver object
+ *
+ * @api
+ */
+mfs_error_t mfsMount(MFSDriver *devp) {
+
+  (void)devp;
+
+  return MFS_NOERROR;
+}
+
+/**
+ * @brief   Unmounts a manage flash storage.
+ */
+mfs_error_t mfsUnmount(MFSDriver *devp) {
+
+  (void)devp;
+
+  return MFS_NOERROR;
+}
+
+/**
+ * @brief   Retrieves and reads a data record.
+ *
+ * @param[in] devp      pointer to the @p MFSDriver object
+ * @param[in] id        record numeric identifier
+ * @param[in,out] np    on input is the maximum buffer size, on return it is
+ *                      the size of the data copied into the buffer
+ * @param[in] buffer    pointer to a buffer for record data
+ *
+ * @api
+ */
+mfs_error_t mfsReadRecord(MFSDriver *devp, uint32_t id,
+                          uint32_t *np, uint8_t *buffer) {
+
+  (void)devp;
+  (void)id;
+  (void)np;
+  (void)buffer;
+
+  return MFS_NOERROR;
+}
+
+/**
+ * @brief   Creates or updates a data record.
+ *
+ * @param[in] devp      pointer to the @p MFSDriver object
+ * @param[in] id        record numeric identifier
+ * @param[in] n         size of data to be written, it cannot be zero
+ * @param[in] buffer    pointer to a buffer for record data
+ *
+ * @api
+ */
+mfs_error_t mfsUpdateRecord(MFSDriver *devp, uint32_t id,
+                            uint32_t n, const uint8_t *buffer) {
+
+  (void)devp;
+  (void)id;
+  (void)n;
+  (void)buffer;
+
+  return MFS_NOERROR;
+}
+
+/**
+ * @brief   Erases a data record.
+ *
+ * @param[in] devp      pointer to the @p MFSDriver object
+ * @param[in] id        record numeric identifier
+ *
+ * @api
+ */
+mfs_error_t mfsEraseRecord(MFSDriver *devp, uint32_t id) {
+
+  (void)devp;
+  (void)id;
+
+  return MFS_NOERROR;
+}
+
 /** @} */
diff --git a/os/ex/subsystems/mfs/mfs.h b/os/ex/subsystems/mfs/mfs.h
index 7abbde0da..61310f91d 100644
--- a/os/ex/subsystems/mfs/mfs.h
+++ b/os/ex/subsystems/mfs/mfs.h
@@ -52,17 +52,32 @@
 /*===========================================================================*/
 
 /**
- * @brief   Driver state machine possible states.
+ * @brief   Type of driver state machine states.
  */
 typedef enum {
   MFS_UNINIT = 0,
   MFS_STOP = 1,
   MFS_READY = 2,
-  MFS_ACTIVE = 3
+  MFS_MOUNTED = 3,
+  MFS_ACTIVE = 4
 } mfs_state_t;
 
 /**
- * @brief   Bank header.
+ * @brief   Type of an MFS error code.
+ * @note    Errors are negative integers, informative warnings are positive
+ *          integers.
+ */
+typedef enum {
+  MFS_NOERROR = 0,
+  MFS_REPAIR_WARNING = 1,
+  MFS_GC_WARNING = 2,
+  MFS_ID_NOT_FOUND = -1,
+  MFS_CRC_ERROR = -2,
+  MFS_FLASH_FAILURE = -3
+} mfs_error_t;
+
+/**
+ * @brief   Type of a bank header.
  * @note    The header resides in the first 16 bytes of a bank extending
  *          to the next page boundary.
  */
@@ -86,7 +101,7 @@ typedef struct {
 } mfs_bank_header_t;
 
 /**
- * @brief   Data block header.
+ * @brief   Type of a data block header.
  */
 typedef union {
   struct {
@@ -119,6 +134,22 @@ typedef struct {
    * @brief   Flash driver associated to this MFS instance.
    */
   BaseFlash                 *flashp;
+  /**
+   * @brief   Base sector index for bank 0.
+   */
+  flash_sector_t            bank0_start;
+  /**
+   * #brief   Number of sectors for bank 0.
+   */
+  flash_sector_t            bank0_sectors;
+  /**
+   * @brief   Base sector index for bank 1.
+   */
+  flash_sector_t            bank1_start;
+  /**
+   * #brief   Number of sectors for bank 1.
+   */
+  flash_sector_t            bank1_sectors;
 } MFSConfig;
   
 /**
@@ -151,6 +182,13 @@ extern "C" {
   void mfsObjectInit(MFSDriver *devp);
   void mfsStart(MFSDriver *devp, const MFSConfig *config);
   void mfsStop(MFSDriver *devp);
+  mfs_error_t mfsMount(MFSDriver *devp);
+  mfs_error_t mfsUnmount(MFSDriver *devp);
+  mfs_error_t mfsReadRecord(MFSDriver *devp, uint32_t id,
+                            uint32_t *np, uint8_t *buffer);
+  mfs_error_t mfsUpdateRecord(MFSDriver *devp, uint32_t id,
+                              uint32_t n, const uint8_t *buffer);
+  mfs_error_t mfsEraseRecord(MFSDriver *devp, uint32_t id);
 #ifdef __cplusplus
 }
 #endif
diff --git a/testhal/STM32/STM32L4xx/QSPI-N25Q128/Makefile b/testhal/STM32/STM32L4xx/QSPI-N25Q128/Makefile
index 110783df6..0b9b33cdd 100644
--- a/testhal/STM32/STM32L4xx/QSPI-N25Q128/Makefile
+++ b/testhal/STM32/STM32L4xx/QSPI-N25Q128/Makefile
@@ -99,6 +99,7 @@ include $(CHIBIOS)/os/rt/rt.mk
 include $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC/mk/port_v7m.mk
 # Other files (optional).
 include $(CHIBIOS)/os/ex/Micron/m25q.mk
+include $(CHIBIOS)/os/ex/subsystems/mfs/mfs.mk
 include $(CHIBIOS)/os/hal/lib/streams/streams.mk
 
 # Define linker script file here
@@ -115,6 +116,7 @@ CSRC = $(STARTUPSRC) \
        $(BOARDSRC) \
        $(STREAMSSRC) \
        $(M25QSRC) \
+       $(MFSSRC) \
        main.c
 
 # C++ sources that can be compiled in ARM or THUMB mode depending on the global
@@ -148,7 +150,7 @@ ASMXSRC = $(STARTUPASM) $(PORTASM) $(OSALASM)
 INCDIR = $(CHIBIOS)/os/license \
          $(STARTUPINC) $(KERNINC) $(PORTINC) $(OSALINC) \
          $(HALINC) $(PLATFORMINC) $(BOARDINC) $(M25QINC) \
-         $(STREAMSINC) $(CHIBIOS)/os/various
+         $(MFSINC) $(STREAMSINC) $(CHIBIOS)/os/various
 
 #
 # Project, sources and paths