diff --git a/src/main/java/ru/redguy/tftpserver/datasource/VirtualFileSystem.java b/src/main/java/ru/redguy/tftpserver/datasource/VirtualFileSystem.java
new file mode 100644
index 0000000..4552ec3
--- /dev/null
+++ b/src/main/java/ru/redguy/tftpserver/datasource/VirtualFileSystem.java
@@ -0,0 +1,55 @@
+package ru.redguy.tftpserver.datasource;
+
+import java.io.*;
+import java.util.HashMap;
+
+public class VirtualFileSystem implements IDataSource {
+
+    private HashMap<String, File> fileHashMap = new HashMap<>();
+
+    public VirtualFileSystem() {
+
+    }
+
+    public void addFile(String name, File file) {
+        fileHashMap.put(name, file);
+    }
+
+    @Override
+    public boolean isFileExists(String file) {
+        return fileHashMap.containsKey(file);
+    }
+
+    @Override
+    public boolean isFile(String file) {
+        return fileHashMap.containsKey(file);
+    }
+
+    @Override
+    public boolean isCanRead(String file) {
+        return fileHashMap.containsKey(file);
+    }
+
+    @Override
+    public OutputStream getOutputStream(String file) {
+        try {
+            return new FileOutputStream(fileHashMap.get(file));
+        } catch (FileNotFoundException e) {
+            return null;
+        }
+    }
+
+    @Override
+    public InputStream getInputStream(String file) {
+        try {
+            return new FileInputStream(fileHashMap.get(file));
+        } catch (FileNotFoundException e) {
+            return null;
+        }
+    }
+
+    @Override
+    public void delete(String file) {
+        fileHashMap.remove(file);
+    }
+}
diff --git a/src/test/java/Main.java b/src/test/java/Main.java
index 29df5c8..b67c15d 100644
--- a/src/test/java/Main.java
+++ b/src/test/java/Main.java
@@ -3,14 +3,19 @@ import ru.redguy.tftpserver.TFTPServer;
 import ru.redguy.tftpserver.TFTPread;
 import ru.redguy.tftpserver.TFTPwrite;
 import ru.redguy.tftpserver.datasource.FileSystem;
+import ru.redguy.tftpserver.datasource.IDataSource;
+import ru.redguy.tftpserver.datasource.VirtualFileSystem;
 
+import java.io.File;
 import java.net.SocketException;
 
 public class Main {
     public static void main(String[] args) {
         TFTPServer tftpServer = new TFTPServer();
+        VirtualFileSystem ds = new VirtualFileSystem();
+        ds.addFile("a.gradle",new File("build.gradle"));
         try {
-            tftpServer.start(1000,false,new FileSystem("gradle"));
+            tftpServer.start(1000,false,ds);
         } catch (SocketException e) {
             e.printStackTrace();
         }