diff --git a/.gitmodules b/.gitmodules
index d882a1488..dcc3b8dd1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,3 +13,6 @@
 [submodule "Ubiquitous/Nuttx_Fusion_XiUOS/nuttx"]
 	path = Ubiquitous/Nuttx_Fusion_XiUOS/nuttx
 	url = https://code.gitlink.org.cn/wgzAIIT/incubator-nuttx.git
+[submodule "Ubiquitous/XiZi/fs/lwext4/lwext4_submodule"]
+	path = Ubiquitous/XiZi/fs/lwext4/lwext4_submodule
+	url = https://gitlink.org.cn/xuos/lwext4_filesystem_support_XiUOS.git
diff --git a/Ubiquitous/XiZi/board/ok1052-c/Kconfig b/Ubiquitous/XiZi/board/ok1052-c/Kconfig
index 5f685a174..62afaf430 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/Kconfig
+++ b/Ubiquitous/XiZi/board/ok1052-c/Kconfig
@@ -44,7 +44,6 @@ menu "ok1052-c feature"
         config MOUNT_SDCARD
             bool "mount cd card"
             default n
-            select BSP_USING_SDIO
     endmenu
 
 endmenu
diff --git a/Ubiquitous/XiZi/board/ok1052-c/board.c b/Ubiquitous/XiZi/board/ok1052-c/board.c
index 363c8424c..5b1174a39 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/board.c
+++ b/Ubiquitous/XiZi/board/ok1052-c/board.c
@@ -41,30 +41,6 @@ extern int ExtSramInit(void);
 #endif
 #endif
 
-#if defined(FS_VFS) && defined(MOUNT_SDCARD)
-#include <iot-vfs.h>
-
-// SD card mount flag 1: OK
-int sd_mount_flag = 0;
-
-/**
- * @description: Mount SD card
- * @return 0
- */
-int MountSDCard(void)
-{
-    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, FSTYPE_FATFS, "/") == 0)
-    {
-        sd_mount_flag = 1;
-        KPrintf("sd card mount to '/'");
-    }
-    else
-        KPrintf("sd card mount to '/' failed!");
-
-    return 0;
-}
-#endif
-
 #if defined(SDK_I2C_BASED_COMPONENT_USED) && SDK_I2C_BASED_COMPONENT_USED
 #include "fsl_lpi2c.h"
 #endif /* SDK_I2C_BASED_COMPONENT_USED */
diff --git a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/include/connect_sdio.h b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/include/connect_sdio.h
index 768e0ac3a..501c14422 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/include/connect_sdio.h
+++ b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/include/connect_sdio.h
@@ -27,11 +27,14 @@
 #include <clock_config.h>
 #include <fsl_gpio.h>
 #include <fsl_common.h>
+#include <connect_gpio.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#define SD_CARD_STACK_SIZE 2048
+
 int Imxrt1052HwSdioInit(void);
 
 #ifdef __cplusplus
diff --git a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/Kconfig b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/Kconfig
index 56ebba209..c2ceb303d 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/Kconfig
+++ b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/Kconfig
@@ -10,4 +10,15 @@ if BSP_USING_SDIO
     config SDIO_DEVICE_NAME
         string "sdio device name"
         default "sdio_dev"
+
+    config MOUNT_SDCARD_FS
+        bool "mount cd card file system"
+        default n
+        select MOUNT_SDCARD
+
+    if MOUNT_SDCARD_FS
+        config MOUNT_SDCARD_FS_TYPE
+            int "choose file system type : FATFS(0) LWEXT4(3)"
+            default 0 
+    endif
 endif
diff --git a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/connect_sdio.c b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/connect_sdio.c
index b29bc4fe6..bebbce78a 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/connect_sdio.c
+++ b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/sdio/connect_sdio.c
@@ -104,9 +104,6 @@ static const sdmmchost_card_switch_voltage_func_t s_sdcard_voltage_switch = {
 };
 #endif
 
-/*! @brief SD card detect flag  */
-static volatile bool s_card_inserted = false;
-
 /*! @brief Card descriptor. */
 static sd_card_t g_sd;
 static int sd_lock = -1;
@@ -142,11 +139,6 @@ static void BoardPowerOnSdCard(void)
     BOARD_USDHC_SDCARD_POWER_CONTROL(1);
 }
 
-static void SdcardDetectCallBack(bool is_inserted, void *user_data)
-{
-    s_card_inserted = is_inserted;
-}
-
 static void CardInformationLog(sd_card_t *card)
 {
     NULL_PARAM_CHECK(card);
@@ -261,6 +253,19 @@ static uint32 SdioWrite(void *dev, struct BusBlockWriteParam *write_param)
     return write_param->size;
 }
 
+static int SdioControl(struct HardwareDev *dev, struct HalDevBlockParam *block_param)
+{
+    NULL_PARAM_CHECK(dev);
+
+    if (OPER_BLK_GETGEOME == block_param->cmd) {
+        block_param->dev_block.size_perbank = g_sd.blockSize;
+        block_param->dev_block.block_size = g_sd.blockSize;
+        block_param->dev_block.bank_num = g_sd.blockCount;
+    }
+
+    return EOK;
+}
+
 static struct SdioDevDone dev_done =
 {
     SdioOpen,
@@ -269,10 +274,126 @@ static struct SdioDevDone dev_done =
     SdioRead,
 };
 
+#if defined(FS_VFS) && defined(MOUNT_SDCARD_FS)
+#include <iot-vfs.h>
+
+int sd_mount_flag = 0;
+
+/**
+ * @description: Mount SD card
+ * @return 0
+ */
+static int MountSDCardFs(enum FilesystemType fs_type)
+{
+    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, fs_type, "/") == 0) {
+        sd_mount_flag = 1;
+        KPrintf("Sd card mount to '/'");
+    } else {
+        KPrintf("Sd card mount to '/' failed!");
+    }
+    
+    return 0;
+}
+#endif
+
+static void SdCardAttach(void)
+{
+    bool is_read_only;
+    static sd_card_t *card = &g_sd;
+    
+    KPrintf("\r\nCard inserted.\r\n");
+    /* reset host once card re-plug in */
+    SD_HostReset(&(card->host));
+    /* power on the card */
+    SD_PowerOnCard(card->host.base, card->usrParam.pwr);
+    KPrintf("Power on done\n");
+
+    /* Init card. */
+    if (SD_CardInit(card)) {
+        KPrintf("\r\nSD card init failed.\r\n");
+        return;
+    }
+
+    /* card information log */
+    CardInformationLog(card);
+
+    /* Check if card is readonly. */
+    is_read_only = SD_CheckReadOnly(card);
+
+#ifdef MOUNT_SDCARD_FS
+    /*mount file system*/
+    MountSDCardFs(MOUNT_SDCARD_FS_TYPE);
+#endif
+}
+
+static void SdCardDetach(void)
+{
+    /*unmount file system*/
+    KPrintf("\r\nCard detect extracted.\r\n");
+
+#ifdef MOUNT_SDCARD_FS
+    UnmountFileSystem("/");
+#endif
+}
+
+static uint8 SdCardReadCd(void)
+{
+	BusType pin;
+
+    pin = BusFind(PIN_BUS_NAME);
+
+    pin->owner_haldev = BusFindDevice(pin, PIN_DEVICE_NAME);
+
+    struct PinStat PinStat;
+
+    struct BusBlockReadParam read_param;
+    read_param.buffer = (void *)&PinStat;
+
+    PinStat.pin = IMXRT_GET_PIN(2, 28);
+    
+    return BusDevReadData(pin->owner_haldev, &read_param);
+}
+
+static void SdCardTask(void* parameter)
+{
+    static int sd_card_status = 0;
+
+    while (1) {
+        if (!SdCardReadCd()) {
+            if (!sd_card_status) {
+                SdCardAttach();
+                sd_card_status = 1;
+            }
+        } else {
+            if (sd_card_status) {
+                SdCardDetach();
+                sd_card_status = 0;
+            }
+        }
+    }
+}
+
+#ifdef MOUNT_SDCARD
+int MountSDCard()
+{
+    int sd_card_task = 0;
+    sd_card_task = KTaskCreate("sd_card", SdCardTask, NONE,
+                           SD_CARD_STACK_SIZE, 8);
+    if(sd_card_task < 0) {		
+		KPrintf("sd_card_task create failed ...%s %d.\n", __FUNCTION__,__LINE__);
+		return ERROR;
+	}
+
+    StartupKTask(sd_card_task);
+
+    return EOK;
+}
+#endif
+
+
 int Imxrt1052HwSdioInit(void)
 {
     x_err_t ret = EOK;
-    bool is_read_only;
 
     static struct SdioBus sdio_bus;
     static struct SdioDriver sdio_drv;
@@ -305,35 +426,6 @@ int Imxrt1052HwSdioInit(void)
         return ERROR;
     }
 
-    KPrintf("\r\nPlease insert a card into board.\r\n");
-
-    /* power off card */
-    SD_PowerOffCard(card->host.base, card->usrParam.pwr);
-
-    if (SD_WaitCardDetectStatus(SD_HOST_BASEADDR, &s_sdcard_detect, true) == kStatus_Success) {
-        KPrintf("\r\nCard inserted.\r\n");
-        /* reset host once card re-plug in */
-        SD_HostReset(&(card->host));
-        /* power on the card */
-        SD_PowerOnCard(card->host.base, card->usrParam.pwr);
-        KPrintf("power on done\n");
-    } else {
-        KPrintf("\r\nCard detect fail.\r\n");
-        return ERROR;
-    }
-
-    /* Init card. */
-    if (SD_CardInit(card)) {
-        KPrintf("\r\nSD card init failed.\r\n");
-        return ERROR;
-    }
-
-    /* card information log */
-    CardInformationLog(card);
-
-    /* Check if card is readonly. */
-    is_read_only = SD_CheckReadOnly(card);
-
     ret = SdioBusInit(&sdio_bus, SDIO_BUS_NAME);
     if (ret != EOK) {
         KPrintf("Sdio bus init error %d\n", ret);
@@ -352,6 +444,7 @@ int Imxrt1052HwSdioInit(void)
     }
 
     sdio_dev.dev_done = &dev_done;
+    sdio_dev.haldev.dev_block_control = SdioControl;
     ret = SdioDeviceRegister(&sdio_dev, SDIO_DEVICE_NAME);
     if (ret != EOK) {
         KPrintf("Sdio device register error %d\n", ret);
diff --git a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/usb/nxp_usb_driver/host_msd_command.c b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
index 78cb4af70..7bab0d1bc 100644
--- a/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
+++ b/Ubiquitous/XiZi/board/ok1052-c/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
@@ -15,8 +15,8 @@
 */
 
 /*************************************************
-File name: usb_misc.h
-Description: modify usb_echo to KPrintf
+File name: host_msd_command.c
+Description: modify usb msd command test function
 Others: take SDK_2.6.1_MIMXRT1052xxxxB/boards/evkbimxrt1050/usb_examples/usb_host_msd_command for references
 History: 
 1. Date: 2022-02-10
diff --git a/Ubiquitous/XiZi/board/xidatong/Kconfig b/Ubiquitous/XiZi/board/xidatong/Kconfig
index fedc84638..9653b4851 100644
--- a/Ubiquitous/XiZi/board/xidatong/Kconfig
+++ b/Ubiquitous/XiZi/board/xidatong/Kconfig
@@ -42,9 +42,8 @@ menu "xidatong feature"
 
     menu "config board peripheral"
         config MOUNT_SDCARD
-            bool "mount cd card"
+            bool "mount sd card"
             default n
-            select BSP_USING_SDIO
     endmenu
 
 endmenu
diff --git a/Ubiquitous/XiZi/board/xidatong/board.c b/Ubiquitous/XiZi/board/xidatong/board.c
index 54a2f1966..add8b5c4c 100644
--- a/Ubiquitous/XiZi/board/xidatong/board.c
+++ b/Ubiquitous/XiZi/board/xidatong/board.c
@@ -29,24 +29,6 @@ Modification:
 #include "board.h"
 #include "pin_mux.h"
 
-#if defined(FS_VFS) && defined(MOUNT_SDCARD)
-#include <iot-vfs.h>
-
-/**
- * @description: Mount SD card
- * @return 0
- */
-int MountSDCard(void)
-{
-    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, FSTYPE_FATFS, "/") == 0)
-        KPrintf("sd card mount to '/'");
-    else
-        KPrintf("sd card mount to '/' failed!");
-    
-    return 0;
-}
-#endif
-
 #if defined(SDK_I2C_BASED_COMPONENT_USED) && SDK_I2C_BASED_COMPONENT_USED
 #include "fsl_lpi2c.h"
 #endif /* SDK_I2C_BASED_COMPONENT_USED */
diff --git a/Ubiquitous/XiZi/board/xidatong/third_party_driver/include/connect_sdio.h b/Ubiquitous/XiZi/board/xidatong/third_party_driver/include/connect_sdio.h
index 6adf230c8..f76b1a46f 100644
--- a/Ubiquitous/XiZi/board/xidatong/third_party_driver/include/connect_sdio.h
+++ b/Ubiquitous/XiZi/board/xidatong/third_party_driver/include/connect_sdio.h
@@ -27,11 +27,14 @@
 #include <clock_config.h>
 #include <fsl_gpio.h>
 #include <fsl_common.h>
+#include <connect_gpio.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#define SD_CARD_STACK_SIZE 2048
+
 int Imxrt1052HwSdioInit(void);
 
 #ifdef __cplusplus
diff --git a/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/Kconfig b/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/Kconfig
index 56ebba209..c2ceb303d 100644
--- a/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/Kconfig
+++ b/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/Kconfig
@@ -10,4 +10,15 @@ if BSP_USING_SDIO
     config SDIO_DEVICE_NAME
         string "sdio device name"
         default "sdio_dev"
+
+    config MOUNT_SDCARD_FS
+        bool "mount cd card file system"
+        default n
+        select MOUNT_SDCARD
+
+    if MOUNT_SDCARD_FS
+        config MOUNT_SDCARD_FS_TYPE
+            int "choose file system type : FATFS(0) LWEXT4(3)"
+            default 0 
+    endif
 endif
diff --git a/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/connect_sdio.c b/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/connect_sdio.c
index 431e3fc98..841ed2fc2 100644
--- a/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/connect_sdio.c
+++ b/Ubiquitous/XiZi/board/xidatong/third_party_driver/sdio/connect_sdio.c
@@ -104,9 +104,6 @@ static const sdmmchost_card_switch_voltage_func_t s_sdcard_voltage_switch = {
 };
 #endif
 
-/*! @brief SD card detect flag  */
-static volatile bool s_card_inserted = false;
-
 /*! @brief Card descriptor. */
 static sd_card_t g_sd;
 static int sd_lock = -1;
@@ -142,11 +139,6 @@ static void BoardPowerOnSdCard(void)
     BOARD_USDHC_SDCARD_POWER_CONTROL(1);
 }
 
-static void SdcardDetectCallBack(bool is_inserted, void *user_data)
-{
-    s_card_inserted = is_inserted;
-}
-
 static void CardInformationLog(sd_card_t *card)
 {
     NULL_PARAM_CHECK(card);
@@ -261,6 +253,19 @@ static uint32 SdioWrite(void *dev, struct BusBlockWriteParam *write_param)
     return write_param->size;
 }
 
+static int SdioControl(struct HardwareDev *dev, struct HalDevBlockParam *block_param)
+{
+    NULL_PARAM_CHECK(dev);
+
+    if (OPER_BLK_GETGEOME == block_param->cmd) {
+        block_param->dev_block.size_perbank = g_sd.blockSize;
+        block_param->dev_block.block_size = g_sd.blockSize;
+        block_param->dev_block.bank_num = g_sd.blockCount;
+    }
+
+    return EOK;
+}
+
 static struct SdioDevDone dev_done = 
 {
     SdioOpen,
@@ -269,10 +274,121 @@ static struct SdioDevDone dev_done =
     SdioRead,
 };
 
+#if defined(FS_VFS) && defined(MOUNT_SDCARD_FS)
+#include <iot-vfs.h>
+
+/**
+ * @description: Mount SD card
+ * @return 0
+ */
+static int MountSDCardFs(enum FilesystemType fs_type)
+{
+    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, fs_type, "/") == 0)
+        KPrintf("Sd card mount to '/'");
+    else
+        KPrintf("Sd card mount to '/' failed!");
+    
+    return 0;
+}
+#endif
+
+static void SdCardAttach(void)
+{
+    bool is_read_only;
+    static sd_card_t *card = &g_sd;
+    
+    KPrintf("\r\nCard inserted.\r\n");
+    /* reset host once card re-plug in */
+    SD_HostReset(&(card->host));
+    /* power on the card */
+    SD_PowerOnCard(card->host.base, card->usrParam.pwr);
+    KPrintf("Power on done\n");
+
+    /* Init card. */
+    if (SD_CardInit(card)) {
+        KPrintf("\r\nSD card init failed.\r\n");
+        return;
+    }
+
+    /* card information log */
+    CardInformationLog(card);
+
+    /* Check if card is readonly. */
+    is_read_only = SD_CheckReadOnly(card);
+
+#ifdef MOUNT_SDCARD_FS
+    /*mount file system*/
+    MountSDCardFs(MOUNT_SDCARD_FS_TYPE);
+#endif
+}
+
+static void SdCardDetach(void)
+{
+    /*unmount file system*/
+    KPrintf("\r\nCard detect extracted.\r\n");
+
+#ifdef MOUNT_SDCARD_FS
+    UnmountFileSystem("/");
+#endif
+}
+
+static uint8 SdCardReadCd(void)
+{
+	BusType pin;
+
+    pin = BusFind(PIN_BUS_NAME);
+
+    pin->owner_haldev = BusFindDevice(pin, PIN_DEVICE_NAME);
+
+    struct PinStat PinStat;
+
+    struct BusBlockReadParam read_param;
+    read_param.buffer = (void *)&PinStat;
+
+    PinStat.pin = IMXRT_GET_PIN(2, 28);
+    
+    return BusDevReadData(pin->owner_haldev, &read_param);
+}
+
+static void SdCardTask(void* parameter)
+{
+    static int sd_card_status = 0;
+
+    while (1) {
+        if (!SdCardReadCd()) {
+            if (!sd_card_status) {
+                SdCardAttach();
+                sd_card_status = 1;
+            }
+        } else {
+            if (sd_card_status) {
+                SdCardDetach();
+                sd_card_status = 0;
+            }
+        }
+    }
+}
+
+#ifdef MOUNT_SDCARD
+int MountSDCard()
+{
+    int sd_card_task = 0;
+    sd_card_task = KTaskCreate("sd_card", SdCardTask, NONE,
+                           SD_CARD_STACK_SIZE, 8);
+    if(sd_card_task < 0) {		
+		KPrintf("sd_card_task create failed ...%s %d.\n", __FUNCTION__,__LINE__);
+		return ERROR;
+	}
+
+    StartupKTask(sd_card_task);
+
+    return EOK;
+}
+#endif
+
 int Imxrt1052HwSdioInit(void)
 {
     x_err_t ret = EOK;
-    bool is_read_only;
     
     static struct SdioBus sdio_bus;
     static struct SdioDriver sdio_drv;
@@ -304,35 +420,6 @@ int Imxrt1052HwSdioInit(void)
         KPrintf("\r\nSD host init fail\r\n");
         return ERROR;
     }
-
-    KPrintf("\r\nPlease insert a card into board.\r\n");
-
-    /* power off card */
-    SD_PowerOffCard(card->host.base, card->usrParam.pwr);
-
-    if (SD_WaitCardDetectStatus(SD_HOST_BASEADDR, &s_sdcard_detect, true) == kStatus_Success) {
-        KPrintf("\r\nCard inserted.\r\n");
-        /* reset host once card re-plug in */
-        SD_HostReset(&(card->host));
-        /* power on the card */
-        SD_PowerOnCard(card->host.base, card->usrParam.pwr);
-        KPrintf("power on done\n");
-    } else {
-        KPrintf("\r\nCard detect fail.\r\n");
-        return ERROR;
-    }
-
-    /* Init card. */
-    if (SD_CardInit(card)) {
-        KPrintf("\r\nSD card init failed.\r\n");
-        return ERROR;
-    }
-
-    /* card information log */
-    CardInformationLog(card);
-
-    /* Check if card is readonly. */
-    is_read_only = SD_CheckReadOnly(card);
     
     ret = SdioBusInit(&sdio_bus, SDIO_BUS_NAME);
     if (ret != EOK) {
@@ -352,6 +439,7 @@ int Imxrt1052HwSdioInit(void)
     }
 
     sdio_dev.dev_done = &dev_done;
+    sdio_dev.haldev.dev_block_control = SdioControl;
     ret = SdioDeviceRegister(&sdio_dev, SDIO_DEVICE_NAME);
     if (ret != EOK) {
         KPrintf("Sdio device register error %d\n", ret);
diff --git a/Ubiquitous/XiZi/board/xidatong/third_party_driver/usb/nxp_usb_driver/host_msd_command.c b/Ubiquitous/XiZi/board/xidatong/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
index 78cb4af70..7bab0d1bc 100644
--- a/Ubiquitous/XiZi/board/xidatong/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
+++ b/Ubiquitous/XiZi/board/xidatong/third_party_driver/usb/nxp_usb_driver/host_msd_command.c
@@ -15,8 +15,8 @@
 */
 
 /*************************************************
-File name: usb_misc.h
-Description: modify usb_echo to KPrintf
+File name: host_msd_command.c
+Description: modify usb msd command test function
 Others: take SDK_2.6.1_MIMXRT1052xxxxB/boards/evkbimxrt1050/usb_examples/usb_host_msd_command for references
 History: 
 1. Date: 2022-02-10
diff --git a/Ubiquitous/XiZi/fs/lwext4/Kconfig b/Ubiquitous/XiZi/fs/lwext4/Kconfig
index e69de29bb..afa4938f1 100644
--- a/Ubiquitous/XiZi/fs/lwext4/Kconfig
+++ b/Ubiquitous/XiZi/fs/lwext4/Kconfig
@@ -0,0 +1,7 @@
+config CONFIG_USE_DEFAULT_CFG
+    int
+    default 1
+
+config CONFIG_HAVE_OWN_OFLAGS
+    int
+    default 0
diff --git a/Ubiquitous/XiZi/fs/lwext4/Makefile b/Ubiquitous/XiZi/fs/lwext4/Makefile
index 15357b7bc..6c25f1470 100644
--- a/Ubiquitous/XiZi/fs/lwext4/Makefile
+++ b/Ubiquitous/XiZi/fs/lwext4/Makefile
@@ -1,4 +1,3 @@
+SRC_DIR := lwext4_submodule
 
-
-
-include $(KERNEL_ROOT)/compiler.mk
\ No newline at end of file
+include $(KERNEL_ROOT)/compiler.mk
diff --git a/Ubiquitous/XiZi/fs/lwext4/lwext4_submodule b/Ubiquitous/XiZi/fs/lwext4/lwext4_submodule
new file mode 160000
index 000000000..1eba3cfed
--- /dev/null
+++ b/Ubiquitous/XiZi/fs/lwext4/lwext4_submodule
@@ -0,0 +1 @@
+Subproject commit 1eba3cfeda305e5c735827805e90f5f1c8043394
diff --git a/Ubiquitous/XiZi/fs/shared/include/iot-vfs.h b/Ubiquitous/XiZi/fs/shared/include/iot-vfs.h
index bc61255da..d1531e5c2 100644
--- a/Ubiquitous/XiZi/fs/shared/include/iot-vfs.h
+++ b/Ubiquitous/XiZi/fs/shared/include/iot-vfs.h
@@ -24,6 +24,9 @@ enum FilesystemType
     FSTYPE_FATFS = 0,
     FSTYPE_IOTDEVICEFILE,
     FSTYPE_CH376,
+#ifdef FS_LWEXT4
+    FSTYPE_LWEXT4,
+#endif
     FSTYPE_END,
 };
 
diff --git a/Ubiquitous/XiZi/kernel/include/xs_init.h b/Ubiquitous/XiZi/kernel/include/xs_init.h
index 745377e91..09e813178 100644
--- a/Ubiquitous/XiZi/kernel/include/xs_init.h
+++ b/Ubiquitous/XiZi/kernel/include/xs_init.h
@@ -40,6 +40,7 @@ extern int FlashW25qxxSpiDeviceInit(void);
 extern int LoraSx12xxSpiDeviceInit(void);
 extern int FatfsInit(void);
 extern int Ch376fsInit(void);
+extern int Lwext4Init(void);
 extern int LibcSystemInit(void);
 extern int RtcNtpSyncInit(void);
 extern int MountSDCard(void);
diff --git a/Ubiquitous/XiZi/kernel/thread/init.c b/Ubiquitous/XiZi/kernel/thread/init.c
index 4813111cd..00e255d26 100644
--- a/Ubiquitous/XiZi/kernel/thread/init.c
+++ b/Ubiquitous/XiZi/kernel/thread/init.c
@@ -95,6 +95,9 @@ struct InitSequenceDesc components_init[] =
 #endif
 #ifdef FS_CH376
 	{ "ch376", Ch376fsInit },
+#endif
+#ifdef FS_LWEXT4
+	{ "lwext4", Lwext4Init },
 #endif
 	{ "libc_system", LibcSystemInit },
 #ifdef RTC_SYNC_USING_NTP
diff --git a/Ubiquitous/XiZi/path_kernel.mk b/Ubiquitous/XiZi/path_kernel.mk
index 3c5d630d2..91a7f3e45 100755
--- a/Ubiquitous/XiZi/path_kernel.mk
+++ b/Ubiquitous/XiZi/path_kernel.mk
@@ -354,6 +354,12 @@ ifeq ($(CONFIG_LIB_NEWLIB),y)
 KERNELPATHS += -I$(KERNEL_ROOT)/lib/newlib/include #
 endif
 
+ifeq ($(CONFIG_FS_LWEXT4),y)
+KERNELPATHS += -I$(KERNEL_ROOT)/fs/lwext4/lwext4_submodule/blockdev/xiuos #
+KERNELPATHS += -I$(KERNEL_ROOT)/fs/lwext4/lwext4_submodule/include #
+KERNELPATHS += -I$(KERNEL_ROOT)/fs/lwext4/lwext4_submodule/include/misc 
+endif
+
 
 ifeq ($(ARCH), risc-v)
 KERNELPATHS +=-I$(KERNEL_ROOT)/arch/risc-v/shared