diff --git a/README.md b/README.md
index 2164c50..590390d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,6 @@ FatFs has being developped as a personal project of the author, ChaN.
 
 See [elm-chan.org/fsw/ff](http://elm-chan.org/fsw/ff/00index_e.html)
 
-Modified by ST, see the st_readme.txt.
-Modified to fit Arduino libraries specifications.
+Modified by ST, used source from [stm32_mw_fatfs](https://github.com/STMicroelectronics/stm32_mw_fatfs) and modified to fit Arduino libraries specifications.
 
-It is used by the STM32SD library.
+It is used by the [STM32SD](https://github.com/stm32duino/STM32SD) library.
diff --git a/library.json b/library.json
new file mode 100644
index 0000000..a0a5f1d
--- /dev/null
+++ b/library.json
@@ -0,0 +1,26 @@
+{
+    "name": "FatFS",
+    "keywords": "Fat, FS, Storage",
+    "description": "FAT file system based on open-source FatFS solution",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/stm32duino/FatFs.git"
+    },
+    "version": "2.0.4",
+    "authors": [
+        {
+            "url": "http://elm-chan.org/fsw/ff/00index_e.html",
+            "maintainer": false,
+            "email": "user5@elm-chan.org",
+            "name": "Chan"
+        },
+        {
+            "url": "https://www.st.com/",
+            "maintainer": false,
+            "email": null,
+            "name": "STMicroelectronics"
+        }
+    ],
+    "frameworks": "*",
+    "platforms": "*"
+}
diff --git a/library.properties b/library.properties
index ab65880..f7b0598 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=FatFs
-version=2.0.3
+version=2.0.4
 author=Chan <user5@elm-chan org>, ST
 maintainer=stm32duino
 sentence=FAT file system based on open-source FatFS solution.
diff --git a/src/drivers/sd_diskio.c b/src/drivers/sd_diskio.c
index 3c51dad..84abc6a 100644
--- a/src/drivers/sd_diskio.c
+++ b/src/drivers/sd_diskio.c
@@ -105,13 +105,10 @@ const Diskio_drvTypeDef  SD_Driver =
 /* Private functions ---------------------------------------------------------*/
 static DSTATUS SD_CheckStatus(BYTE lun)
 {
+  (void)lun;
   Stat = STA_NOINIT;
 
-#ifndef STM32L1xx
   if(BSP_SD_GetCardState() == MSD_OK)
-#else /* STM32L1xx */
-  if(BSP_SD_GetStatus() == MSD_OK)
-#endif
   {
     Stat &= ~STA_NOINIT;
   }
@@ -128,7 +125,6 @@ DSTATUS SD_initialize(BYTE lun)
 {
   Stat = STA_NOINIT;
 #if !defined(DISABLE_SD_INIT)
-
   if(BSP_SD_Init() == MSD_OK)
   {
     Stat = SD_CheckStatus(lun);
@@ -160,7 +156,7 @@ DSTATUS SD_status(BYTE lun)
   */
 DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
 {
-#ifndef STM32L1xx
+  (void)lun;
   DRESULT res = RES_ERROR;
 
   if(BSP_SD_ReadBlocks((uint32_t*)buff,
@@ -173,17 +169,6 @@ DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
     }
     res = RES_OK;
   }
-#else /* STM32L1xx */
-  DRESULT res = RES_OK;
-
-  if(BSP_SD_ReadBlocks((uint32_t*)buff,
-                       (uint64_t) (sector * SD_DEFAULT_BLOCK_SIZE),
-                       SD_DEFAULT_BLOCK_SIZE,
-                       count) != MSD_OK)
-  {
-    res = RES_ERROR;
-  }
-#endif
   return res;
 }
 
@@ -198,7 +183,7 @@ DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
 #if _USE_WRITE == 1
 DRESULT SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
 {
-#ifndef STM32L1xx
+  (void)lun;
   DRESULT res = RES_ERROR;
 
   if(BSP_SD_WriteBlocks((uint32_t*)buff,
@@ -211,16 +196,6 @@ DRESULT SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
     }
     res = RES_OK;
   }
-#else /* STM32L1xx */
-  DRESULT res = RES_OK;
-
-  if(BSP_SD_WriteBlocks((uint32_t*)buff,
-                        (uint64_t)(sector * SD_DEFAULT_BLOCK_SIZE),
-                        SD_DEFAULT_BLOCK_SIZE, count) != MSD_OK)
-  {
-    res = RES_ERROR;
-  }
-#endif
   return res;
 }
 #endif /* _USE_WRITE == 1 */
@@ -235,12 +210,9 @@ DRESULT SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
 #if _USE_IOCTL == 1
 DRESULT SD_ioctl(BYTE lun, BYTE cmd, void *buff)
 {
+  (void)lun;
   DRESULT res = RES_ERROR;
-#ifndef STM32L1xx
-  BSP_SD_CardInfo CardInfo;
-#else /* STM32L1xx */
   SD_CardInfo CardInfo;
-#endif
   if (Stat & STA_NOINIT) return RES_NOTRDY;
 
   switch (cmd)
@@ -253,33 +225,21 @@ DRESULT SD_ioctl(BYTE lun, BYTE cmd, void *buff)
   /* Get number of sectors on the disk (DWORD) */
   case GET_SECTOR_COUNT :
     BSP_SD_GetCardInfo(&CardInfo);
-#ifndef STM32L1xx
     *(DWORD*)buff = CardInfo.LogBlockNbr;
-#else /* STM32L1xx */
-    *(DWORD*)buff = CardInfo.CardCapacity / SD_DEFAULT_BLOCK_SIZE;
-#endif
     res = RES_OK;
     break;
 
   /* Get R/W sector size (WORD) */
   case GET_SECTOR_SIZE :
-#ifndef STM32L1xx
     BSP_SD_GetCardInfo(&CardInfo);
     *(WORD*)buff = CardInfo.LogBlockSize;
-#else /* STM32L1xx */
-    *(WORD*)buff = SD_DEFAULT_BLOCK_SIZE;
-#endif
     res = RES_OK;
     break;
 
   /* Get erase block size in unit of sector (DWORD) */
   case GET_BLOCK_SIZE :
-#ifndef STM32L1xx
     BSP_SD_GetCardInfo(&CardInfo);
     *(DWORD*)buff = CardInfo.LogBlockSize / SD_DEFAULT_BLOCK_SIZE;
-#else /* STM32L1xx */
-    *(DWORD*)buff = SD_DEFAULT_BLOCK_SIZE;
-#endif
     res = RES_OK;
     break;
 
diff --git a/src/ff_gen_drv.c b/src/ff_gen_drv.c
index 5cb050e..5fc14a0 100644
--- a/src/ff_gen_drv.c
+++ b/src/ff_gen_drv.c
@@ -109,6 +109,7 @@ uint8_t FATFS_LinkDriver(const Diskio_drvTypeDef *drv, char *path)
   */
 uint8_t FATFS_UnLinkDriverEx(char *path, uint8_t lun)
 {
+  (void)lun;
   uint8_t DiskNum = 0;
   uint8_t ret = 1;