diff --git a/rtos/code/driver/na51089/source/mcu/sf_sd_common.c b/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
index dc2ea25d4..1c4df5db2 100755
--- a/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
+++ b/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
@@ -57,7 +57,7 @@ BOOL sf_is_card_full(void)
 
 UINT32 sf_check_card_full(void)
 {
-    int diskFree = 0;
+    UINT64 diskFree = 0;
     UINT32 ret = 0;
         
     //UIMenuStoreInfo *puiPara = sf_ui_para_get();
@@ -85,7 +85,7 @@ UINT32 sf_check_card_full(void)
             //printf("%s:%d sd card no full diskFree=%lu",__FUNCTION__,__LINE__,diskFree);
     }
 
-    //printf("[%s:%d]sd card diskFree=%dM\n", __FUNCTION__, __LINE__, diskFree);
+    printf("[%s:%d]sd card diskFree=%lluM\n", __FUNCTION__, __LINE__, diskFree);
 
     return ret;
 }