diff --git a/README.md b/README.md
index 6ee59f6..bad0b82 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ https://pasaopasen.github.io/geneticalgorithm2/
 - [Installation](#installation)
 - [Updates information](#updates-information)
   - [**Future**](#future)
+  - [**TODO firstly**](#todo-firstly)
+  - [6.8.7 minor update](#687-minor-update)
   - [6.8.6 minor update](#686-minor-update)
   - [6.8.5 minor update](#685-minor-update)
   - [6.8.4 minor update](#684-minor-update)
@@ -153,6 +155,12 @@ pip install geneticalgorithm2[full]
 ## **TODO firstly**
 - Remove old style mensions from README
 
+## 6.8.7 minor update
+
+- some code refactor
+- fixes:
+  - ensure the directory of generation file exists on save
+
 ## 6.8.6 minor update
 
 - small package installation update: add `pip install geneticalgorithm2[full]` version
diff --git a/geneticalgorithm2/aliases.py b/geneticalgorithm2/aliases.py
index cc2171b..e474ffc 100644
--- a/geneticalgorithm2/aliases.py
+++ b/geneticalgorithm2/aliases.py
@@ -1,11 +1,10 @@
 
-import sys
+
 from typing import List, Tuple, Dict, Sequence, Optional, Any, Callable, Union, TypeVar, Literal
+from typing_extensions import TypeAlias
+
+import os
 
-if sys.version_info.minor < 10:
-    from typing_extensions import TypeAlias
-else:
-    from typing import TypeAlias
 
 Number: TypeAlias = Union[int, float]
 
@@ -14,3 +13,5 @@
 array1D: TypeAlias = np.ndarray
 array2D: TypeAlias = np.ndarray
 
+PathLike: TypeAlias = Union[str, os.PathLike]
+
diff --git a/geneticalgorithm2/classes.py b/geneticalgorithm2/classes.py
index b296cdd..17cc9f7 100644
--- a/geneticalgorithm2/classes.py
+++ b/geneticalgorithm2/classes.py
@@ -7,7 +7,8 @@
 
 import numpy as np
 
-from .aliases import array1D, array2D, TypeAlias
+from .aliases import array1D, array2D, TypeAlias, PathLike
+from .files import mkdir_of_file
 
 from .crossovers import Crossover, CrossoverFunc
 from .mutations import Mutations, MutationIntFunc, MutationFloatFunc
@@ -183,11 +184,12 @@ def as_wide_matrix(self) -> array2D:
         # should not be used in main code -- was needed for old versions
         return union_to_matrix(self.variables, self.scores)
 
-    def save(self, path: str):
+    def save(self, path: PathLike):
+        mkdir_of_file(path)
         np.savez(path, population=self.variables, scores=self.scores)
 
     @staticmethod
-    def load(path: str):
+    def load(path: PathLike):
         try:
             st = np.load(path)
         except Exception as err:
diff --git a/geneticalgorithm2/files.py b/geneticalgorithm2/files.py
new file mode 100644
index 0000000..30563ca
--- /dev/null
+++ b/geneticalgorithm2/files.py
@@ -0,0 +1,27 @@
+
+
+from pathlib import Path
+
+from .aliases import PathLike
+
+
+def _mkdir(path: Path):
+    path.mkdir(parents=True, exist_ok=True)
+
+
+def mkdir_of_file(file_path: PathLike):
+    """
+    для этого файла создаёт папку, в которой он должен лежать
+    """
+    _mkdir(Path(file_path).parent)
+
+
+def mkdir(path: PathLike):
+    """mkdir with parents"""
+    _mkdir(Path(path))
+
+
+def touch(path: PathLike):
+    """makes empty file, makes directories for this file automatically"""
+    mkdir_of_file(path)
+    Path(path).touch()