diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index 77c9c136599ddc18fc712c6349277d5a83545415..d9bc06a6d32e9ee704e6c17e626bb886f3085bde 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -1067,6 +1067,7 @@ class CsstMsFile(dict):
         self.filename = os.path.basename(filepath)
         self.dir_in = os.path.dirname(filepath)
         self.dir_out = dir_out
+        self.kwargs = kwargs
 
         # parse filename
         # CSST_MSC_MS_SCIE_20270713222417_20270713222647_10160000066_01_L0_V01.fits
@@ -1137,6 +1138,14 @@ class CsstMsFile(dict):
             header=header
         )
 
+    def to_dict(self):
+        return dict(
+            filepath=self.filepath,
+            ver_sim=self.ver_sim,
+            dir_out=self.dir_out,
+            kwargs=self.kwargs
+        )
+
     def __repr__(self):
         return f"CsstMsFile(filepath=\"{self.filename}\", ver_sim=\"{self.ver_sim}\", dir_out=\"{self.dir_out}\")"
 # file = CsstMsFile(