diff --git a/nbmodular/jupynbm.py b/nbmodular/jupynbm.py
index a72b8bf..c76c05f 100644
--- a/nbmodular/jupynbm.py
+++ b/nbmodular/jupynbm.py
@@ -1,8 +1,14 @@
 # AUTOGENERATED! DO NOT EDIT! File to edit: ../nbs/jupynbm.ipynb.
 
 # %% auto 0
-__all__ = ['export_jupytext_modules', 'parse_argv_and_run_jupynbm', 'jupynbm_export_cli', 'import_jupytext_modules',
-           'parse_argv_and_run_nbmjupy', 'nbmjupy_import_cli']
+__all__ = [
+    "export_jupytext_modules",
+    "parse_argv_and_run_jupynbm",
+    "jupynbm_export_cli",
+    "import_jupytext_modules",
+    "parse_argv_and_run_nbmjupy",
+    "nbmjupy_import_cli",
+]
 
 # %% ../nbs/jupynbm.ipynb 2
 # Standard
@@ -12,6 +18,7 @@
 from pathlib import Path
 from typing import List
 import os
+import glob
 
 # 3rd party
 from jupytext.cli import jupytext
@@ -20,6 +27,7 @@
 from .export import nbm_export_all_paths, nbm_update_all_paths
 from .utils import create_or_get_logger, get_config
 
+
 # %% ../nbs/jupynbm.ipynb 4
 def export_jupytext_modules(jupytext_path: str, nbm_path: str) -> None:
     """
@@ -28,9 +36,14 @@ def export_jupytext_modules(jupytext_path: str, nbm_path: str) -> None:
     current_path = os.getcwd()
     os.chdir(jupytext_path)
 
-    jupytext("--set-formats ipynb,py *.py".split())
+    jupytext(
+        "--set-formats ipynb,py:percent --format-options comment_magics=false *.py".split()
+    )
     os.chdir(current_path)
-    shutil.move(f"{jupytext_path}/*.ipynb", nbm_path)
+
+    for f in glob.glob(f"{jupytext_path}/*.ipynb"):
+        shutil.move(f, nbm_path)
+
     nbm_export_all_paths(nbm_path)
 
 
@@ -57,14 +70,13 @@ def parse_argv_and_run_jupynbm(argv: List[str]):
         args.jupytext = str(Path(get_config()["jupy_path"]).resolve())
     if args.nbm is None:
         args.nbm = str(Path(get_config()["nbm_path"]).resolve())
-    logger.info(
-        f"Exporting jupytext python modules from {args.jupytext}, to {args.nbm}"
-    )
+    logger.info(f"Exporting jupytext python modules from {args.jupytext} to {args.nbm}")
     export_jupytext_modules(args.jupytext, args.nbm)
 
 
 def jupynbm_export_cli():
-    parse_argv_and_run_jupynbm(sys.argv)
+    parse_argv_and_run_jupynbm(sys.argv[1:])
+
 
 # %% ../nbs/jupynbm.ipynb 6
 def import_jupytext_modules(nbm_path: str, jupytext_path: str) -> None:
@@ -73,10 +85,20 @@ def import_jupytext_modules(nbm_path: str, jupytext_path: str) -> None:
     """
     current_path = os.getcwd()
     nbm_update_all_paths(nbm_path)
-    shutil.copy(f"{nbm_path}/*.ipynb", jupytext_path)
+
+    # move notebooks from nbm to jupytext folder
+    for f in glob.glob(f"{nbm_path}/*.ipynb"):
+        shutil.move(f, jupytext_path)
+
     os.chdir(jupytext_path)
-    jupytext("--set-formats ipynb,py --format-options comment_magics=false *.ipynb".split())
-    os.remove("*.ipynb")
+    jupytext(
+        "--set-formats ipynb,py:percent --format-options comment_magics=false *.ipynb".split()
+    )
+
+    # move notebooks from jupytext to nbm folder
+    for f in glob.glob(f"{jupytext_path}/*.ipynb"):
+        shutil.move(f, nbm_path)
+
     os.chdir(current_path)
 
 
@@ -103,9 +125,9 @@ def parse_argv_and_run_nbmjupy(argv: List[str]):
         args.jupytext = str(Path(get_config()["jupy_path"]).resolve())
     if args.nbm is None:
         args.nbm = str(Path(get_config()["nbm_path"]).resolve())
-    logger.info(f"Exporting nbm notebooks from {args.nbmjupytext} to {args.nbm}")
+    logger.info(f"Exporting nbm notebooks from {args.nbm} to {args.jupytext}")
     import_jupytext_modules(args.nbm, args.jupytext)
 
 
 def nbmjupy_import_cli():
-    parse_argv_and_run_nbmjupy(sys.argv)
+    parse_argv_and_run_nbmjupy(sys.argv[1:])
diff --git a/nbmodular/utils.py b/nbmodular/utils.py
index 8e00e3f..40d1605 100644
--- a/nbmodular/utils.py
+++ b/nbmodular/utils.py
@@ -1,8 +1,15 @@
 # AUTOGENERATED! DO NOT EDIT! File to edit: ../nbs/utils.ipynb.
 
 # %% auto 0
-__all__ = ['imported_jupytext', 'set_handle_and_log_level', 'set_log_level', 'create_or_get_logger', 'get_repo_root_folder',
-           'cd_root', 'get_config']
+__all__ = [
+    "imported_jupytext",
+    "set_handle_and_log_level",
+    "set_log_level",
+    "create_or_get_logger",
+    "get_repo_root_folder",
+    "cd_root",
+    "get_config",
+]
 
 # %% ../nbs/utils.ipynb 2
 # standard
@@ -27,6 +34,7 @@
 except ImportError:
     pass
 
+
 # %% ../nbs/utils.ipynb 5
 def set_handle_and_log_level(
     logger,
@@ -37,16 +45,18 @@ def set_handle_and_log_level(
     handler.setLevel(log_level)
     logger.addHandler(handler)
 
+
 # %% ../nbs/utils.ipynb 7
 def set_log_level(logger, log_level):
     logger.setLevel(log_level)
     for handler in logger.handlers:
         handler.setLevel(log_level)
 
+
 # %% ../nbs/utils.ipynb 9
 def create_or_get_logger(
     name: str = "nbmodular",
-    log_level: Optional[str] = None,
+    log_level: Optional[str] = "INFO",
     log_path: Optional[str] = "logs",
     file_name: str = "log.log",
     to_file=True,
@@ -68,6 +78,7 @@ def create_or_get_logger(
         set_log_level(logger, log_level)
     return logger
 
+
 # %% ../nbs/utils.ipynb 11
 def get_repo_root_folder(
     file_to_look_for_in_root_folder="settings.ini",
@@ -90,16 +101,19 @@ def get_repo_root_folder(
     repo_root_folder = Path(".").resolve()
     return repo_root_folder
 
+
 # %% ../nbs/utils.ipynb 12
 def _cd_root_nbdev_impl():
     config = nbdev.config.get_config()
     os.chdir(config.config_path)
 
+
 # %% ../nbs/utils.ipynb 13
 def cd_root():
     repo_root_path = get_repo_root_folder()
     os.chdir(repo_root_path)
 
+
 # %% ../nbs/utils.ipynb 15
 def get_config(path: str = "settings.ini"):
     config = ConfigParser(delimiters=["="])