diff --git a/src/hdf5_lib.py b/src/hdf5_lib.py
index 9d39288..c623ee9 100644
--- a/src/hdf5_lib.py
+++ b/src/hdf5_lib.py
@@ -239,7 +239,7 @@ def copy_file_in_group(source_file_path, dest_file_obj : h5py.File, dest_group_n
         os.remove(tmp_file_path)
 
 def create_hdf5_file_from_filesystem_path(output_filename : str, 
-                                          input_file_system_path : str, 
+                                          path_to_input_directory: str, 
                                           select_dir_keywords = [], 
                                           select_file_keywords =[], 
                                           top_sub_dir_mask : bool = True,
@@ -257,7 +257,7 @@ def create_hdf5_file_from_filesystem_path(output_filename : str,
     ----------
     output_filename : str
         Name of the output HDF5 file.
-    input_file_system_path : str
+    path_to_input_directory: str
         Path to root directory, specified with forward slashes, e.g., path/to/root.
     select_dir_keywords : list
         List of string elements to consider or select only directory paths that contain
@@ -278,17 +278,17 @@ def create_hdf5_file_from_filesystem_path(output_filename : str,
     """
 
     allowed_file_extensions = filereader_registry.file_extensions 
-    if '/' in input_file_system_path:
-        input_file_system_path = input_file_system_path.replace('/',os.sep)
+    if '/' in path_to_input_directory:
+        path_to_input_directory= path_to_input_directory.replace('/',os.sep)
     else:
-        raise  ValueError('input_file_system_path needs to be specified using forward slashes "/".' )
+        raise  ValueError('path_to_input_directory needs to be specified using forward slashes "/".' )
     
     for i, keyword in enumerate(select_dir_keywords):
         select_dir_keywords[i] = keyword.replace('/',os.sep)          
 
     # Copy input_directory into the output_dir_path, and work with it from now on
     output_dir_path = os.path.splitext(output_filename)[0].replace('/',os.sep)
-    path_to_filenames_dict = utils.copy_directory_with_contraints(input_file_system_path, 
+    path_to_filenames_dict = utils.copy_directory_with_contraints(path_to_input_directory, 
                                                                         output_dir_path, 
                                                                         select_dir_keywords, 
                                                                         select_file_keywords,