diff --git a/third_party/fatfs-0.14/source/port/fatfs_usbd.c b/third_party/fatfs-0.14/source/port/fatfs_usbd.c
new file mode 100644
index 00000000..e34e7405
--- /dev/null
+++ b/third_party/fatfs-0.14/source/port/fatfs_usbd.c
@@ -0,0 +1,60 @@
+#include "diskio.h"
+#include "string.h"
+#include "hal_flash.h"
+
+#define FLASH_START_ADDR  0x00040000 /*addr start from 256k */
+#define FLASH_BLOCK_SIZE  4096
+#define FLASH_BLOCK_COUNT 64
+
+extern const char *FR_Table[];
+
+int USB_disk_status(void)
+{
+    return 0;
+}
+int USB_disk_initialize(void)
+{
+    return RES_OK;
+}
+int USB_disk_read(BYTE *buff, LBA_t sector, UINT count)
+{
+    flash_read(FLASH_START_ADDR + sector * FLASH_BLOCK_SIZE, (uint8_t *)buff, count * FLASH_BLOCK_SIZE);
+    return 0;
+}
+int USB_disk_write(const BYTE *buff, LBA_t sector, UINT count)
+{
+    flash_erase(FLASH_START_ADDR + sector * FLASH_BLOCK_SIZE, 4096);
+    flash_write(FLASH_START_ADDR + sector * FLASH_BLOCK_SIZE, (uint8_t *)buff, count * FLASH_BLOCK_SIZE);
+    return 0;
+}
+int USB_disk_ioctl(BYTE cmd, void *buff)
+{
+    int result = 0;
+
+    switch (cmd) {
+        case CTRL_SYNC:
+            result = RES_OK;
+            break;
+
+        case GET_SECTOR_SIZE:
+            *(WORD *)buff = FLASH_BLOCK_SIZE;
+            result = RES_OK;
+            break;
+
+        case GET_BLOCK_SIZE:
+            *(DWORD *)buff = 1;
+            result = RES_OK;
+            break;
+
+        case GET_SECTOR_COUNT:
+            *(DWORD *)buff = FLASH_BLOCK_COUNT;
+            result = RES_OK;
+            break;
+
+        default:
+            result = RES_PARERR;
+            break;
+    }
+
+    return result;
+}
\ No newline at end of file
diff --git a/third_party/fatfs-0.14/source/port/fatfs_usbh.c b/third_party/fatfs-0.14/source/port/fatfs_usbh.c
new file mode 100644
index 00000000..b3104b6e
--- /dev/null
+++ b/third_party/fatfs-0.14/source/port/fatfs_usbh.c
@@ -0,0 +1,58 @@
+#include "diskio.h"
+#include "usbh_core.h"
+#include "usbh_msc.h"
+
+struct usbh_msc *active_msc_class;
+
+int USB_disk_status(void)
+{
+    return 0;
+}
+int USB_disk_initialize(void)
+{
+    active_msc_class = (struct usbh_msc *)usbh_find_class_instance("/dev/sda");
+    if (active_msc_class == NULL) {
+        printf("do not find /dev/sda\r\n");
+        return -1;
+    }
+    return RES_OK;
+}
+int USB_disk_read(BYTE *buff, LBA_t sector, UINT count)
+{
+    return usbh_msc_scsi_read10(active_msc_class, sector, buff, count);
+}
+int USB_disk_write(const BYTE *buff, LBA_t sector, UINT count)
+{
+    return usbh_msc_scsi_write10(active_msc_class, sector, buff, count);
+}
+int USB_disk_ioctl(BYTE cmd, void *buff)
+{
+    int result = 0;
+
+    switch (cmd) {
+        case CTRL_SYNC:
+            result = RES_OK;
+            break;
+
+        case GET_SECTOR_SIZE:
+            *(WORD *)buff = active_msc_class->blocksize;
+            result = RES_OK;
+            break;
+
+        case GET_BLOCK_SIZE:
+            *(DWORD *)buff = 1;
+            result = RES_OK;
+            break;
+
+        case GET_SECTOR_COUNT:
+            *(DWORD *)buff = active_msc_class->blocknum;
+            result = RES_OK;
+            break;
+
+        default:
+            result = RES_PARERR;
+            break;
+    }
+
+    return result;
+}
\ No newline at end of file