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 d264d48a8..3bbeaebec 100755
--- a/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
+++ b/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
@@ -66,6 +66,7 @@ UINT32 sf_check_card_full(void)
     //UIMenuStoreInfo *puiPara = sf_ui_para_get();
     if(!sf_in_card_exist())
     {
+        IsCardFull = TRUE;
         return 1;
     }
 
@@ -95,7 +96,7 @@ UINT32 sf_check_card_full(void)
 
 BOOL sf_is_emmc_full(void)
 {
-	//printf("[%s]:%d IsCardFull:%d\n", __FUNCTION__, __LINE__, IsCardFull);
+	//printf("[%s]:%d IsEmmcFull:%d\n", __FUNCTION__, __LINE__, IsEmmcFull);
 	return IsEmmcFull;
 }
 
@@ -113,7 +114,7 @@ UINT32 sf_check_emmc_full(void)
             ret = TRUE;
             //if(0 == puiPara->SdLoopSwitch)
             {
-                    IsCardFull = TRUE;
+                    IsEmmcFull = TRUE;
             }
             //printf("%s:%d sd card is full diskFree=%lu",__FUNCTION__,__LINE__,diskFree);
     }
@@ -178,7 +179,7 @@ void SF_RtosStrgUnInit(void)
 	DBG_WRN("SF_RtosStrgUnInit!\n");
 }
 
-static UINT32 sf_rtos_mmc_dev_space_check_full(MMC_DEV_TYPE mmc_dev)
+UINT32 sf_rtos_mmc_dev_space_check_full(MMC_DEV_TYPE mmc_dev)
 {
 	UINT64 diskFree = 0;
     UINT32 ret = 0;
@@ -249,14 +250,14 @@ SF_RTOS_ST_MMC_DEV *SF_RtosStrgCheckWorkableDev(void)
 {
 	MMC_DEV_TYPE workable_dev = MMC_DEV_NO;
 
-	if((sf_rtos_mmc_dev[MMC_DEV_SD]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED) &&
-		(sf_rtos_mmc_dev[MMC_DEV_EMMC]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED))
-	{
-		workable_dev = MMC_DEV_NO;
-	}
+    if((sf_rtos_mmc_dev[MMC_DEV_SD]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED) &&
+        (sf_rtos_mmc_dev[MMC_DEV_EMMC]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED))
+    {
+        workable_dev = MMC_DEV_NO;
+    }
     else if(sf_rtos_mmc_dev[MMC_DEV_SD]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED)
     {
-        if(!sf_rtos_mmc_dev_space_check_full(MMC_DEV_EMMC))
+        if(!sf_is_emmc_full())
         {
             workable_dev = MMC_DEV_EMMC;
         }
@@ -270,7 +271,7 @@ SF_RTOS_ST_MMC_DEV *SF_RtosStrgCheckWorkableDev(void)
     }
     else if(sf_rtos_mmc_dev[MMC_DEV_EMMC]->moumted_state == MMC_DEV_MOUNT_STATE_UNMOUNTED)
     {
-        if(!sf_rtos_mmc_dev_space_check_full(MMC_DEV_SD))
+        if(!sf_is_card_full())
         {
             workable_dev = MMC_DEV_SD;
         }
@@ -284,16 +285,16 @@ SF_RTOS_ST_MMC_DEV *SF_RtosStrgCheckWorkableDev(void)
     }
     else
     {
-        if(!sf_rtos_mmc_dev_space_check_full(MMC_DEV_EMMC) &&
-           !sf_rtos_mmc_dev_space_check_full(MMC_DEV_SD))
+        if(!sf_is_emmc_full() &&
+           !sf_is_card_full())
         {
             workable_dev = MMC_DEV_EMMC;
         }
-        else if(!sf_rtos_mmc_dev_space_check_full(MMC_DEV_EMMC))
+        else if(!sf_is_emmc_full())
         {
             workable_dev = MMC_DEV_EMMC;
         }
-        else if(!sf_rtos_mmc_dev_space_check_full(MMC_DEV_SD))
+        else if(!sf_is_card_full())
         {
             workable_dev = MMC_DEV_SD;
         }