diff --git a/backup-daemon/customizeghostImageproxy.cpp b/backup-daemon/customizeghostImageproxy.cpp
index 1ef0882..375388e 100755
--- a/backup-daemon/customizeghostImageproxy.cpp
+++ b/backup-daemon/customizeghostImageproxy.cpp
@@ -78,8 +78,7 @@ bool CustomizeGhostImageProxy::checkEnvEx()
     }
 
     // 4、校验空间是否充足
-    QFileInfo backup(m_srcPath);
-    qint64 itotalSize = backup.size();
+    qint64 itotalSize = Utils::getDirOrFileSize(m_srcPath);
     m_destPath = m_backupWrapper.m_prefixDestPath + GHOST_PATH;
     m_destPath.replace("//", "/");
     Utils::mkpath(m_destPath);
diff --git a/backup-daemon/ghostimageproxy.cpp b/backup-daemon/ghostimageproxy.cpp
index 505a030..1b16313 100755
--- a/backup-daemon/ghostimageproxy.cpp
+++ b/backup-daemon/ghostimageproxy.cpp
@@ -58,8 +58,7 @@ bool GhostImageProxy::checkEnvEx()
         emit checkResult(int(BackupResult::GHOST_SRC_DIRECTORY_IS_NOT_EXIST));
         return false;
     }
-    QFileInfo backup(dataPath);
-    qint64 itotalSize = backup.size();
+    qint64 itotalSize = Utils::getDirOrFileSize(dataPath);
 
     // 4、校验空间大小是否充足
     m_destPath = Utils::getSysRootPath() + GHOST_PATH;
diff --git a/backup-daemon/udiskghostImageproxy.cpp b/backup-daemon/udiskghostImageproxy.cpp
index af793f9..2f0936d 100755
--- a/backup-daemon/udiskghostImageproxy.cpp
+++ b/backup-daemon/udiskghostImageproxy.cpp
@@ -73,8 +73,7 @@ bool UDiskGhostImageProxy::checkEnvEx()
         emit checkResult(int(BackupResult::GHOST_SRC_DIRECTORY_IS_NOT_EXIST));
         return false;
     }
-    QFileInfo backup(dataPath);
-    qint64 itotalSize = backup.size();
+    qint64 itotalSize = Utils::getDirOrFileSize(dataPath);
 
     // 4、校验移动设备情况：空间大小、文件格式、挂载模式等
     QString backupPath(m_backupWrapper.m_prefixDestPath);