diff --git a/app/src/main/java/ru/project/App.java b/app/src/main/java/ru/project/App.java
index 73f5efa..2e2df6b 100644
--- a/app/src/main/java/ru/project/App.java
+++ b/app/src/main/java/ru/project/App.java
@@ -4,7 +4,7 @@ import com.googlecode.lanterna.gui2.MultiWindowTextGUI;
 import com.googlecode.lanterna.screen.Screen;
 import com.googlecode.lanterna.terminal.DefaultTerminalFactory;
 import ru.project.model.AppState;
-import ru.project.ui.main.MainMenu;
+import ru.project.ui.MainMenu;
 
 public final class App {
 
diff --git a/app/src/main/java/ru/project/ui/MainMenu.java b/app/src/main/java/ru/project/ui/MainMenu.java
new file mode 100644
index 0000000..cf3c57f
--- /dev/null
+++ b/app/src/main/java/ru/project/ui/MainMenu.java
@@ -0,0 +1,38 @@
+package ru.project.ui;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.model.AppState;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.collection.CurrentCollectionMenu;
+import ru.project.ui.creation.CreateCollectionMenu;
+
+public class MainMenu extends BaseModalWindow {
+
+  private final ActionListBox menu;
+
+  private final BaseModalWindow currentCollectionMenu;
+  private final BaseModalWindow createCollectionMenu;
+
+  public MainMenu(WindowBasedTextGUI gui, AppState state) {
+    super("Главное меню", gui);
+
+    this.currentCollectionMenu = new CurrentCollectionMenu(gui, state);
+
+    this.createCollectionMenu = new CreateCollectionMenu(gui, state);
+
+    menu = new ActionListBox();
+
+    menu.addItem("Меню текущей коллекции", currentCollectionMenu::showModal);
+
+    menu.addItem("Меню создания новой коллекции", createCollectionMenu::showModal);
+
+    menu.addItem("Завершить выполнение программы", this::exit);
+
+    setComponent(menu);
+  }
+
+  private void exit() {
+    close();
+  }
+}
diff --git a/app/src/main/java/ru/project/ui/collection/CurrentCollectionMenu.java b/app/src/main/java/ru/project/ui/collection/CurrentCollectionMenu.java
new file mode 100644
index 0000000..8dad545
--- /dev/null
+++ b/app/src/main/java/ru/project/ui/collection/CurrentCollectionMenu.java
@@ -0,0 +1,64 @@
+package ru.project.ui.collection;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.model.AppState;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.collection.sorting.SortCollectionMenu;
+import ru.project.ui.common.CollectionDisplayWindow;
+import ru.project.ui.common.CollectionFileSaveWindow;
+import ru.project.ui.common.MessageWindow;
+
+public class CurrentCollectionMenu extends BaseModalWindow {
+
+  private final AppState state;
+
+  private final SortCollectionMenu sortCollectionMenu;
+
+  public CurrentCollectionMenu(WindowBasedTextGUI gui, AppState state) {
+
+    super("Меню текущей коллекции", gui);
+
+    this.state = state;
+
+    this.sortCollectionMenu = new SortCollectionMenu(gui, state);
+
+    ActionListBox menu = new ActionListBox();
+
+    menu.addItem("Показать коллекцию", this::showCurrentCollection);
+
+    menu.addItem("Сохранить коллекцию в файл", this::saveCurrentCollection);
+
+    menu.addItem("Сортировать коллекцию", sortCollectionMenu::showModal);
+
+    menu.addItem("Поиск элемента в коллекции", this::searchCollection);
+
+    menu.addItem("Подсчёт количества вхождений элемента", this::countOccurrences);
+
+    menu.addItem("Выйти", this::close);
+
+    setComponent(menu);
+  }
+
+  private void showCurrentCollection() {
+    CollectionDisplayWindow window = new CollectionDisplayWindow(gui, state.getMainCollection());
+
+    window.showModal();
+  }
+
+  private void saveCurrentCollection() {
+    CollectionFileSaveWindow window = new CollectionFileSaveWindow(gui, state.getMainCollection());
+
+    window.showModal();
+  }
+
+  private void searchCollection() {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private void countOccurrences() {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+}
diff --git a/app/src/main/java/ru/project/ui/sorting/NormalSortSettingsWindow.java b/app/src/main/java/ru/project/ui/collection/sorting/NormalSortSettingsWindow.java
similarity index 97%
rename from app/src/main/java/ru/project/ui/sorting/NormalSortSettingsWindow.java
rename to app/src/main/java/ru/project/ui/collection/sorting/NormalSortSettingsWindow.java
index 0f3bbd2..6e66e45 100644
--- a/app/src/main/java/ru/project/ui/sorting/NormalSortSettingsWindow.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/NormalSortSettingsWindow.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 import com.googlecode.lanterna.gui2.ActionListBox;
 import com.googlecode.lanterna.gui2.Button;
diff --git a/app/src/main/java/ru/project/ui/sorting/ParitySortSettingsWindow.java b/app/src/main/java/ru/project/ui/collection/sorting/ParitySortSettingsWindow.java
similarity index 94%
rename from app/src/main/java/ru/project/ui/sorting/ParitySortSettingsWindow.java
rename to app/src/main/java/ru/project/ui/collection/sorting/ParitySortSettingsWindow.java
index aa6d090..b458b43 100644
--- a/app/src/main/java/ru/project/ui/sorting/ParitySortSettingsWindow.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/ParitySortSettingsWindow.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 import com.googlecode.lanterna.gui2.Button;
 import com.googlecode.lanterna.gui2.Label;
diff --git a/app/src/main/java/ru/project/ui/sorting/SortCollectionMenu.java b/app/src/main/java/ru/project/ui/collection/sorting/SortCollectionMenu.java
similarity index 98%
rename from app/src/main/java/ru/project/ui/sorting/SortCollectionMenu.java
rename to app/src/main/java/ru/project/ui/collection/sorting/SortCollectionMenu.java
index ae72b4b..9694764 100644
--- a/app/src/main/java/ru/project/ui/sorting/SortCollectionMenu.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/SortCollectionMenu.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 import com.googlecode.lanterna.gui2.Button;
 import com.googlecode.lanterna.gui2.Label;
diff --git a/app/src/main/java/ru/project/ui/sorting/SortField.java b/app/src/main/java/ru/project/ui/collection/sorting/SortField.java
similarity index 65%
rename from app/src/main/java/ru/project/ui/sorting/SortField.java
rename to app/src/main/java/ru/project/ui/collection/sorting/SortField.java
index 6219f9b..5b6124b 100644
--- a/app/src/main/java/ru/project/ui/sorting/SortField.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/SortField.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 public enum SortField {
   GROUP_NUMBER,
diff --git a/app/src/main/java/ru/project/ui/sorting/SortMethod.java b/app/src/main/java/ru/project/ui/collection/sorting/SortMethod.java
similarity index 52%
rename from app/src/main/java/ru/project/ui/sorting/SortMethod.java
rename to app/src/main/java/ru/project/ui/collection/sorting/SortMethod.java
index 446f27e..9e56a8d 100644
--- a/app/src/main/java/ru/project/ui/sorting/SortMethod.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/SortMethod.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 public enum SortMethod {
   NORMAL,
diff --git a/app/src/main/java/ru/project/ui/sorting/SortMethodSelectionWindow.java b/app/src/main/java/ru/project/ui/collection/sorting/SortMethodSelectionWindow.java
similarity index 95%
rename from app/src/main/java/ru/project/ui/sorting/SortMethodSelectionWindow.java
rename to app/src/main/java/ru/project/ui/collection/sorting/SortMethodSelectionWindow.java
index 121e5e2..dc49e68 100644
--- a/app/src/main/java/ru/project/ui/sorting/SortMethodSelectionWindow.java
+++ b/app/src/main/java/ru/project/ui/collection/sorting/SortMethodSelectionWindow.java
@@ -1,4 +1,4 @@
-package ru.project.ui.sorting;
+package ru.project.ui.collection.sorting;
 
 import com.googlecode.lanterna.gui2.ActionListBox;
 import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
diff --git a/app/src/main/java/ru/project/ui/common/CollectionFileSaveWindow.java b/app/src/main/java/ru/project/ui/common/CollectionFileSaveWindow.java
new file mode 100644
index 0000000..9388da9
--- /dev/null
+++ b/app/src/main/java/ru/project/ui/common/CollectionFileSaveWindow.java
@@ -0,0 +1,76 @@
+package ru.project.ui.common;
+
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import com.googlecode.lanterna.gui2.dialogs.FileDialogBuilder;
+import com.googlecode.lanterna.gui2.dialogs.MessageDialog;
+import com.googlecode.lanterna.gui2.dialogs.MessageDialogButton;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import ru.project.collection.MyList;
+import ru.project.student.Student;
+
+public class CollectionFileSaveWindow {
+
+  private final WindowBasedTextGUI gui;
+  private final MyList<Student> collection;
+
+  public CollectionFileSaveWindow(WindowBasedTextGUI gui, MyList<Student> collection) {
+
+    this.gui = gui;
+    this.collection = collection;
+  }
+
+  public void showModal() {
+    File selectedFile = selectFile();
+
+    if (selectedFile == null) {
+      return;
+    }
+
+    if (selectedFile.exists()) {
+      saveToFile(selectedFile);
+      return;
+    }
+
+    MessageDialogButton result =
+        MessageDialog.showMessageDialog(
+            gui,
+            "Создание файла",
+            "Файл не существует. Создать новый файл?",
+            MessageDialogButton.Yes,
+            MessageDialogButton.No);
+
+    if (result == MessageDialogButton.Yes) {
+      saveToFile(selectedFile);
+    }
+  }
+
+  private File selectFile() {
+    return new FileDialogBuilder()
+        .setTitle("Сохранение коллекции")
+        .setDescription("Выберите файл:")
+        .setActionLabel("Сохранить")
+        .build()
+        .showDialog(gui);
+  }
+
+  private void saveToFile(File file) {
+    try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) {
+
+      for (int i = 0; i < collection.size(); i++) {
+        Student student = collection.get(i);
+
+        writer.write(student == null ? "null" : student.toString());
+
+        writer.newLine();
+      }
+
+      MessageWindow.showModal(gui, "Коллекция успешно сохранена.");
+
+    } catch (IOException e) {
+      MessageWindow.showModal(gui, "Не удалось сохранить коллекцию.");
+    }
+  }
+}
diff --git a/app/src/main/java/ru/project/ui/main/MainMenu.java b/app/src/main/java/ru/project/ui/main/MainMenu.java
deleted file mode 100644
index ff4899e..0000000
--- a/app/src/main/java/ru/project/ui/main/MainMenu.java
+++ /dev/null
@@ -1,80 +0,0 @@
-package ru.project.ui.main;
-
-import com.googlecode.lanterna.gui2.ActionListBox;
-import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
-import ru.project.collection.MyList;
-import ru.project.model.AppState;
-import ru.project.student.Student;
-import ru.project.ui.base.BaseModalWindow;
-import ru.project.ui.common.CollectionDisplayWindow;
-import ru.project.ui.common.MessageWindow;
-import ru.project.ui.creation.CreateCollectionMenu;
-import ru.project.ui.sorting.SortCollectionMenu;
-
-public class MainMenu extends BaseModalWindow {
-
-  private final ActionListBox menu;
-
-  private final BaseModalWindow createCollectionMenu;
-  private final BaseModalWindow sortCollectionMenu;
-
-  public MainMenu(WindowBasedTextGUI gui, AppState state) {
-    super("Главное меню", gui);
-
-    this.createCollectionMenu = new CreateCollectionMenu(gui, state);
-    this.sortCollectionMenu = new SortCollectionMenu(gui, state);
-
-    menu = new ActionListBox();
-
-    menu.addItem("Показать текущую коллекцию", () -> showMainCollection(state));
-
-    menu.addItem("Меню создания новой коллекции", this::showCreateCollectionMenu);
-
-    menu.addItem("Меню сохранения текущей коллекции в файл", this::saveCollection);
-
-    menu.addItem("Меню сортировки текущей коллекции", this::sortCollection);
-
-    menu.addItem("Меню поиска элемента в текущей коллекции", this::searchCollection);
-
-    menu.addItem("Меню подсчёта количества вхождений элемента", this::countOccurrences);
-
-    menu.addItem("Завершить выполнение программы", this::exit);
-
-    setComponent(menu);
-  }
-
-  private void showMainCollection(AppState state) {
-    MyList<Student> mainCollection = state.getMainCollection();
-
-    BaseModalWindow window = new CollectionDisplayWindow(gui, mainCollection);
-
-    window.showModal();
-  }
-
-  private void showCreateCollectionMenu() {
-    createCollectionMenu.showModal();
-  }
-
-  private void saveCollection() {
-    // TODO
-    MessageWindow.showModal(gui, "Не реализовано.");
-  }
-
-  private void sortCollection() {
-    sortCollectionMenu.showModal();
-  }
-
-  private void searchCollection() {
-    // TODO
-    MessageWindow.showModal(gui, "Не реализовано.");
-  }
-
-  private void countOccurrences() {
-    // TODO
-    MessageWindow.showModal(gui, "Не реализовано.");
-  }
-
-  private void exit() {
-    close();
-  }
-}