diff --git a/src/main/java/com/kamco/cd/training/common/utils/FIleChecker.java b/src/main/java/com/kamco/cd/training/common/utils/FIleChecker.java
index 98a5341..b9ba07b 100644
--- a/src/main/java/com/kamco/cd/training/common/utils/FIleChecker.java
+++ b/src/main/java/com/kamco/cd/training/common/utils/FIleChecker.java
@@ -506,11 +506,15 @@ public class FIleChecker {
 
     try {
       File dir = new File(targetPath);
+      log.info("targetPath={}", targetPath);
+      log.info("absolute targetPath={}", dir.getAbsolutePath());
+
       if (!dir.exists()) {
         dir.mkdirs();
       }
 
       File dest = new File(dir, String.valueOf(chunkIndex));
+      log.info("real save path = {}", dest.getAbsolutePath());
 
       log.info("chunkIndex={}, uploadSize={}", chunkIndex, mfile.getSize());
       log.info("savedSize={}", dest.length());
@@ -522,6 +526,9 @@ public class FIleChecker {
       log.info("after delete={}", dest.length());
       mfile.transferTo(dest);
 
+      log.info("after transfer size={}", dest.length());
+      log.info("after transfer exists={}", dest.exists());
+
       return true;
     } catch (IOException e) {
       log.error("chunk save error", e);