diff --git a/commander/src/main/java/hse/java/commander/MainController.java b/commander/src/main/java/hse/java/commander/MainController.java
index 5de3b66d..12304ddb 100644
--- a/commander/src/main/java/hse/java/commander/MainController.java
+++ b/commander/src/main/java/hse/java/commander/MainController.java
@@ -1,45 +1,158 @@
 package hse.java.commander;
 
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
 import javafx.scene.control.ListView;
 
-import java.nio.file.Path;
-
 public class MainController {
+  @FXML public ListView<String> left;
+
+  @FXML public ListView<String> right;
+
+  @FXML public Button copy;
+
+  @FXML public Button move;
 
-    @FXML
-    public ListView<String> left;
+  @FXML public Button delete;
 
-    @FXML
-    public ListView<String> right;
+  private Path leftDir;
+  private Path rightDir;
+  private ListView<String> activePanel;
 
-    @FXML
-    public Button move;
+  public void setInitialDirs(Path leftStart, Path rightStart) {
+    this.leftDir = leftStart;
+    this.rightDir = rightStart;
+    updatePanel(left, leftDir);
+    updatePanel(right, rightDir);
+  }
 
-    private Path leftDir;
-    private Path rightDir;
+  public void initialize() {
+    left.setOnMouseClicked(event -> {
+      activePanel = left;
+      if (event.getClickCount() == 2) {
+        navigatePanel(left, leftDir, true);
+      }
+    });
 
-    // for testing
-    public void setInitialDirs(Path leftStart, Path rightStart) {
-        this.leftDir = leftStart;
-        this.rightDir = rightStart;
+    right.setOnMouseClicked(event -> {
+      activePanel = right;
+      if (event.getClickCount() == 2) {
+        navigatePanel(right, rightDir, false);
+      }
+    });
+
+    copy.setOnAction(event -> copyFile());
+    move.setOnAction(event -> moveFile());
+    delete.setOnAction(event -> deleteFile());
+  }
+
+  private void updatePanel(ListView<String> panel, Path dir) {
+    panel.getItems().clear();
+    panel.getItems().add("...");
+    File[] files = dir.toFile().listFiles();
+    if (files != null) {
+      for (File file : files) {
+        panel.getItems().add(file.getName());
+      }
+    }
+  }
+
+  private void navigatePanel(ListView<String> panel, Path currentDir,
+                             boolean isLeft) {
+    String selected = panel.getSelectionModel().getSelectedItem();
+    if (selected == null)
+      return;
+
+    if (selected.equals("...")) {
+      Path parent = currentDir.getParent();
+      if (parent != null) {
+        if (isLeft) {
+          leftDir = parent;
+          updatePanel(left, leftDir);
+        } else {
+          rightDir = parent;
+          updatePanel(right, rightDir);
+        }
+      }
+    } else {
+      Path newPath = currentDir.resolve(selected);
+      if (Files.isDirectory(newPath)) {
+        if (isLeft) {
+          leftDir = newPath;
+          updatePanel(left, leftDir);
+        } else {
+          rightDir = newPath;
+          updatePanel(right, rightDir);
+        }
+      }
     }
+  }
+
+  private void copyFile() {
+    if (activePanel == null)
+      return;
+    String selected = activePanel.getSelectionModel().getSelectedItem();
+    if (selected == null || selected.equals("..."))
+      return;
+
+    Path sourceDir = (activePanel == left) ? leftDir : rightDir;
+    Path targetDir = (activePanel == left) ? rightDir : leftDir;
+    ListView<String> targetPanel = (activePanel == left) ? right : left;
+
+    Path source = sourceDir.resolve(selected);
+    Path target = targetDir.resolve(selected);
+
+    try {
+      Files.copy(source, target, StandardCopyOption.REPLACE_EXISTING);
+      updatePanel(targetPanel, targetDir);
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+
+  private void moveFile() {
+    if (activePanel == null)
+      return;
+    String selected = activePanel.getSelectionModel().getSelectedItem();
+    if (selected == null || selected.equals("..."))
+      return;
+
+    Path sourceDir = (activePanel == left) ? leftDir : rightDir;
+    Path targetDir = (activePanel == left) ? rightDir : leftDir;
+    ListView<String> targetPanel = (activePanel == left) ? right : left;
+
+    Path source = sourceDir.resolve(selected);
+    Path target = targetDir.resolve(selected);
+
+    try {
+      Files.move(source, target, StandardCopyOption.REPLACE_EXISTING);
+      updatePanel(activePanel, sourceDir);
+      updatePanel(targetPanel, targetDir);
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+
+  private void deleteFile() {
+    if (activePanel == null)
+      return;
+    String selected = activePanel.getSelectionModel().getSelectedItem();
+    if (selected == null || selected.equals("..."))
+      return;
+
+    Path currentDir = (activePanel == left) ? leftDir : rightDir;
+    Path toDelete = currentDir.resolve(selected);
 
-    public void initialize() {
-        move.setOnMouseClicked(event -> {
-
-        });
-        System.out.println(System.getProperty("user.home"));
-        left.getItems().add("Kek");
-
-        left.setOnMouseClicked(event -> {
-            if (event.getClickCount() == 2) {
-                int index = left.getSelectionModel().getSelectedIndex();
-                if (index >= 0) {
-                    left.getItems().set(index, "clicked");
-                }
-            }
-        });
+    try {
+      Files.deleteIfExists(toDelete);
+      updatePanel(activePanel, currentDir);
+    } catch (IOException e) {
+      e.printStackTrace();
     }
+  }
 }