diff --git a/ArtillerySerde.java b/ArtillerySerde.java
index 14544e3..196b35f 100644
--- a/ArtillerySerde.java
+++ b/ArtillerySerde.java
@@ -1,10 +1,10 @@
 import java.awt.*;
 
 public class ArtillerySerde {  // Artillery Serialization/Deserialization
-    private static final String _separatorForObject = ":";
+    private static final char _separatorForObject = ':';
 
     public static DrawingArtillery deserialize(String info) {
-        String[] strings = info.split(_separatorForObject);
+        String[] strings = info.split(Character.toString(_separatorForObject));
 
         int speed = Integer.parseInt(strings[0]);
         float weight = Float.parseFloat(strings[1]);
@@ -38,7 +38,7 @@ public class ArtillerySerde {  // Artillery Serialization/Deserialization
         EntityArtillery artillery = drawingArtillery.getArtillery();
 
         String result = String.format(
-                "%d%s%f%s%d%s%s%s%d",
+                "%d%c%f%c%d%c%s%c%d",
                 artillery.getSpeed(),
                 _separatorForObject,
                 artillery.getWeight(),
@@ -55,7 +55,7 @@ public class ArtillerySerde {  // Artillery Serialization/Deserialization
         }
 
         return String.format(
-                "%s%s%d%s%b%s%b",
+                "%s%c%d%c%b%c%b",
                 result,
                 _separatorForObject,
                 advanced.getDopColor().getRGB(),
diff --git a/MapsCollection.java b/MapsCollection.java
index 5b9f24c..46eefd5 100644
--- a/MapsCollection.java
+++ b/MapsCollection.java
@@ -1,3 +1,4 @@
+import java.io.*;
 import java.util.HashMap;
 import java.util.Set;
 
@@ -7,6 +8,9 @@ public class MapsCollection {
     private final int _pictureWidth;
     private final int _pictureHeight;
 
+    private final char separatorDict = '|';
+    private final char separatorData = ';';
+
     public Set<String> getKeys() {
         return _mapsStorage.keySet();
     }
@@ -38,4 +42,56 @@ public class MapsCollection {
         }
         return null;
     }
+
+    @SuppressWarnings("ResultOfMethodCallIgnored")
+    public boolean saveData(String filename) throws IOException {
+        File file = new File(filename);
+
+        if (file.exists()) {
+            file.delete();
+        }
+
+        file.createNewFile();
+
+        try (PrintWriter writer = new PrintWriter(file)) {
+            writer.println("MapsCollection");
+
+            for (var storage : _mapsStorage.entrySet()) {
+                writer.println(String.format("%s%c%s", storage.getKey(), separatorDict, storage.getValue().getData(separatorDict, separatorData)));
+            }
+        }
+
+        return true;
+    }
+
+    public boolean loadData(String filename) throws IOException {
+        File file = new File(filename);
+
+        if (!file.exists()) {
+            return false;
+        }
+
+        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+            String currentLine = reader.readLine();
+
+            if (currentLine == null || !currentLine.contains("MapsCollection")) {
+                return false;
+            }
+
+            _mapsStorage.clear();
+            while ((currentLine = reader.readLine()) != null) {
+                var elements = currentLine.split(Character.toString(separatorDict));
+
+                AbstractMap map = switch (elements[1]) {
+                    case "SimpleMap" -> new SimpleMap();
+                    case "ForestMap" -> new ForestMap();
+                };
+
+                _mapsStorage.put(elements[0], new MapWithSetArtilleriesGeneric<>(_pictureWidth, _pictureHeight, map));
+                _mapsStorage.get(elements[0]).loadData(elements[2].split(separatorData + "*(\n?)"));
+            }
+        }
+
+        return true;
+    }
 }