diff --git a/components/fatfs/diskio/diskio_rawflash.c b/components/fatfs/diskio/diskio_rawflash.c
index 313aacec4b..639c6d678b 100644
--- a/components/fatfs/diskio/diskio_rawflash.c
+++ b/components/fatfs/diskio/diskio_rawflash.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -25,7 +25,7 @@ static uint8_t s_initialized[FF_VOLUMES];
 #define BPB_TotSec32 32
 
 
-DSTATUS ff_raw_initialize (BYTE pdrv)
+static DSTATUS ff_raw_initialize (BYTE pdrv)
 {
 
     uint16_t sector_size_tmp;
@@ -61,7 +61,7 @@ DSTATUS ff_raw_initialize (BYTE pdrv)
     return STA_PROTECT;
 }
 
-DSTATUS ff_raw_status (BYTE pdrv)
+static DSTATUS ff_raw_status (BYTE pdrv)
 {
     DSTATUS status = STA_PROTECT;
     if (!s_initialized[pdrv]) {
@@ -70,7 +70,7 @@ DSTATUS ff_raw_status (BYTE pdrv)
     return status;
 }
 
-DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
+static DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
 {
     ESP_LOGV(TAG, "ff_raw_read - pdrv=%i, sector=%i, count=%in", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
     const esp_partition_t* part = s_ff_raw_handles[pdrv];
@@ -84,12 +84,12 @@ DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
 }
 
 
-DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
+static DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
 {
     return RES_WRPRT;
 }
 
-DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff)
+static DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff)
 {
     const esp_partition_t* part = s_ff_raw_handles[pdrv];
     ESP_LOGV(TAG, "ff_raw_ioctl: cmd=%in", cmd);
diff --git a/components/fatfs/diskio/diskio_sdmmc.c b/components/fatfs/diskio/diskio_sdmmc.c
index 5bf9dd2cdf..689a07bc62 100644
--- a/components/fatfs/diskio/diskio_sdmmc.c
+++ b/components/fatfs/diskio/diskio_sdmmc.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -34,12 +34,12 @@ static DSTATUS ff_sdmmc_card_available(BYTE pdrv)
 *   fails. This error value is checked throughout the FATFS code.
 *   Both functions return 0 on success.
 */
-DSTATUS ff_sdmmc_initialize (BYTE pdrv)
+static DSTATUS ff_sdmmc_initialize (BYTE pdrv)
 {
     return ff_sdmmc_card_available(pdrv);
 }
 
-DSTATUS ff_sdmmc_status(BYTE pdrv)
+static DSTATUS ff_sdmmc_status(BYTE pdrv)
 {
     if (s_disk_status_check_en[pdrv]) {
         return ff_sdmmc_card_available(pdrv);
@@ -47,7 +47,7 @@ DSTATUS ff_sdmmc_status(BYTE pdrv)
     return 0;
 }
 
-DRESULT ff_sdmmc_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
+static DRESULT ff_sdmmc_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
 {
     sdmmc_card_t* card = s_cards[pdrv];
     assert(card);
@@ -59,7 +59,7 @@ DRESULT ff_sdmmc_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
     return RES_OK;
 }
 
-DRESULT ff_sdmmc_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count)
+static DRESULT ff_sdmmc_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count)
 {
     sdmmc_card_t* card = s_cards[pdrv];
     assert(card);
@@ -72,7 +72,7 @@ DRESULT ff_sdmmc_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count)
 }
 
 #if FF_USE_TRIM
-DRESULT ff_sdmmc_trim (BYTE pdrv, DWORD start_sector, DWORD sector_count)
+static DRESULT ff_sdmmc_trim (BYTE pdrv, DWORD start_sector, DWORD sector_count)
 {
     sdmmc_card_t* card = s_cards[pdrv];
     assert(card);
@@ -88,7 +88,7 @@ DRESULT ff_sdmmc_trim (BYTE pdrv, DWORD start_sector, DWORD sector_count)
 }
 #endif //FF_USE_TRIM
 
-DRESULT ff_sdmmc_ioctl (BYTE pdrv, BYTE cmd, void* buff)
+static DRESULT ff_sdmmc_ioctl (BYTE pdrv, BYTE cmd, void* buff)
 {
     sdmmc_card_t* card = s_cards[pdrv];
     assert(card);
diff --git a/components/fatfs/diskio/diskio_wl.c b/components/fatfs/diskio/diskio_wl.c
index 6c74695d41..64930b1794 100644
--- a/components/fatfs/diskio/diskio_wl.c
+++ b/components/fatfs/diskio/diskio_wl.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -19,17 +19,17 @@ wl_handle_t ff_wl_handles[FF_VOLUMES] = {
         [0 ... FF_VOLUMES - 1] = WL_INVALID_HANDLE
 };
 
-DSTATUS ff_wl_initialize (BYTE pdrv)
+static DSTATUS ff_wl_initialize (BYTE pdrv)
 {
     return 0;
 }
 
-DSTATUS ff_wl_status (BYTE pdrv)
+static DSTATUS ff_wl_status (BYTE pdrv)
 {
     return 0;
 }
 
-DRESULT ff_wl_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
+static DRESULT ff_wl_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
 {
     ESP_LOGV(TAG, "ff_wl_read - pdrv=%i, sector=%i, count=%i", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
     wl_handle_t wl_handle = ff_wl_handles[pdrv];
@@ -42,7 +42,7 @@ DRESULT ff_wl_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
     return RES_OK;
 }
 
-DRESULT ff_wl_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
+static DRESULT ff_wl_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
 {
     ESP_LOGV(TAG, "ff_wl_write - pdrv=%i, sector=%i, count=%i", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
     wl_handle_t wl_handle = ff_wl_handles[pdrv];
@@ -60,7 +60,7 @@ DRESULT ff_wl_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
     return RES_OK;
 }
 
-DRESULT ff_wl_ioctl (BYTE pdrv, BYTE cmd, void *buff)
+static DRESULT ff_wl_ioctl (BYTE pdrv, BYTE cmd, void *buff)
 {
     wl_handle_t wl_handle = ff_wl_handles[pdrv];
     ESP_LOGV(TAG, "ff_wl_ioctl: cmd=%i", cmd);