diff --git a/esp32/include/global.h b/esp32/include/global.h
index 8494410..5e625d1 100644
--- a/esp32/include/global.h
+++ b/esp32/include/global.h
@@ -36,3 +36,16 @@
 #ifndef I2C_FREQUENCY
 #define I2C_FREQUENCY 100000UL
 #endif
+
+// Optional SD card mounting via SDMMC (1-bit mode for ESP32-S3-CAM)
+// Pin definitions - override in build flags if needed
+#ifndef SD_CMD_PIN
+#define SD_CMD_PIN GPIO_NUM_38
+#endif
+#ifndef SD_CLK_PIN
+#define SD_CLK_PIN GPIO_NUM_39
+#endif
+#ifndef SD_DATA_PIN
+#define SD_DATA_PIN GPIO_NUM_40
+#endif
+
diff --git a/esp32/src/filesystem.cpp b/esp32/src/filesystem.cpp
index 376c7c3..4356863 100644
--- a/esp32/src/filesystem.cpp
+++ b/esp32/src/filesystem.cpp
@@ -137,19 +137,6 @@ bool init() {
 
     mkdirRecursive(FS_CONFIG_DIRECTORY);
 
-
-    // Optional SD card mounting via SDMMC (1-bit mode for ESP32-S3-CAM)
-    // Pin definitions - override in build flags if needed
-#ifndef SD_CMD_PIN
-#define SD_CMD_PIN GPIO_NUM_38
-#endif
-#ifndef SD_CLK_PIN
-#define SD_CLK_PIN GPIO_NUM_39
-#endif
-#ifndef SD_DATA_PIN
-#define SD_DATA_PIN GPIO_NUM_40
-#endif
-
     esp_vfs_fat_sdmmc_mount_config_t sd_mount_config = {
         .format_if_mount_failed = false,
         .max_files = 4,
diff --git a/platformio.ini b/platformio.ini
index ccbb375..0861456 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -54,6 +54,12 @@ build_flags =
 	-D USS_RIGHT_PIN=14
 	-D SDA_PIN=47
 	-D SCL_PIN=21
+    -D SD_CMD_PIN=GPIO_NUM_38
+    -D SD_CLK_PIN=GPIO_NUM_39
+    -D SD_DATA_PIN=GPIO_NUM_40
+
+
+    
 
 [env:seeed-xiao-esp32s3]
 platform = espressif32