diff --git a/app/src/main/java/lightcontainer/storage/Adapter.java b/app/src/main/java/lightcontainer/storage/Adapter.java
new file mode 100644
index 0000000..7ffb90d
--- /dev/null
+++ b/app/src/main/java/lightcontainer/storage/Adapter.java
@@ -0,0 +1,16 @@
+package lightcontainer.storage;
+
+public interface Adapter {
+
+    /**
+     * @param appData The appData to stringify
+     * @return The string representation of AppData
+     */
+    String toString(AppData appData);
+
+    /**
+     * @param appDataString The appData string to parse
+     * @return AppData
+     */
+    AppData fromString(String appDataString);
+}
diff --git a/app/src/main/java/lightcontainer/storage/AppData.java b/app/src/main/java/lightcontainer/storage/AppData.java
index 88b245e..2a693b2 100644
--- a/app/src/main/java/lightcontainer/storage/AppData.java
+++ b/app/src/main/java/lightcontainer/storage/AppData.java
@@ -1,6 +1,7 @@
 package lightcontainer.storage;
 
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.Map;
 
 /**
@@ -81,6 +82,10 @@ public class AppData {
         }
     }
 
+    public Iterator<User> usersIterator() {
+        return users.values().iterator();
+    }
+
     /**
      * @param fileName The name of the file
      * @param user     The user
@@ -107,7 +112,8 @@ public class AppData {
         if (!this.users.containsKey(user.getName())) {
             return false;
         } else {
-            return this.users.get(user.getName()).addFile(file);
+            this.users.get(user.getName()).addFile(file);
+            return true;
         }
     }
 
diff --git a/app/src/main/java/lightcontainer/storage/JsonAdapter.java b/app/src/main/java/lightcontainer/storage/JsonAdapter.java
new file mode 100644
index 0000000..d055c12
--- /dev/null
+++ b/app/src/main/java/lightcontainer/storage/JsonAdapter.java
@@ -0,0 +1,70 @@
+package lightcontainer.storage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+
+import java.util.Iterator;
+
+public class JsonAdapter implements Adapter {
+
+    @Override
+    public String toString(AppData appData) {
+        return addData(appData);
+    }
+
+    private String addData(AppData appData) {
+        AppConfig appConfig = appData.getAppConfig();
+        JsonObject config = new JsonObject();
+        config.addProperty("unicast_port", appConfig.getUnicastPort());
+        config.addProperty("multicast_ip", appConfig.getMulticastIp());
+        config.addProperty("multicast_port", appConfig.getMulticastPort());
+        config.addProperty("network_interface", appConfig.getNetworkInterface());
+        config.addProperty("tls", appConfig.isTls());
+        JsonArray users = new JsonArray();
+        Iterator<User> userIterator = appData.usersIterator();
+        addUsers(users, userIterator);
+        config.addProperty("users", users.toString());
+        return config.toString();
+    }
+
+    private void addUsers(JsonArray users, Iterator<User> userIterator) {
+        while (userIterator.hasNext()) {
+            User current = userIterator.next();
+            JsonObject user = new JsonObject();
+            user.addProperty("name", current.getName());
+            user.addProperty("password", current.getPassword());
+            user.addProperty("aes_key", current.getAesKey());
+            JsonArray files = new JsonArray();
+            Iterator<File> fileIterator = current.fileIterator();
+            addFiles(fileIterator);
+            user.addProperty("files", files.toString());
+            users.add(user);
+        }
+    }
+
+    private void addFiles(Iterator<File> fileIterator) {
+        while (fileIterator.hasNext()) {
+            File currentFile = fileIterator.next();
+            JsonObject file = new JsonObject();
+            file.addProperty("name", currentFile.getName());
+            file.addProperty("size", currentFile.getSize());
+            file.addProperty("iv", currentFile.getIv());
+            JsonArray storage = new JsonArray();
+            Iterator<String> storageIterator = currentFile.getStorageIterator();
+            addStorage(storage, storageIterator);
+            file.addProperty("storage", storage.toString());
+        }
+    }
+
+    private void addStorage(JsonArray storage, Iterator<String> storageIterator) {
+        while (storageIterator.hasNext()) {
+            String storageString = storageIterator.next();
+            storage.add(storageString);
+        }
+    }
+
+    @Override
+    public AppData fromString(String appDataString) {
+        return null;
+    }
+}
diff --git a/app/src/main/java/lightcontainer/storage/JsonReader.java b/app/src/main/java/lightcontainer/storage/JsonReader.java
deleted file mode 100644
index 0b67603..0000000
--- a/app/src/main/java/lightcontainer/storage/JsonReader.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package lightcontainer.storage;
-
-public class JsonReader implements FileReader {
-
-    @Override
-    public AppData readFile(String fileName) {
-        return null;
-    }
-}
diff --git a/app/src/main/java/lightcontainer/storage/JsonRepository.java b/app/src/main/java/lightcontainer/storage/JsonRepository.java
deleted file mode 100644
index c2c693d..0000000
--- a/app/src/main/java/lightcontainer/storage/JsonRepository.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package lightcontainer.storage;
-
-public class JsonRepository implements Repository {
-
-
-    @Override
-    public void save(FileWriter fileWriter) {
-
-    }
-
-    @Override
-    public AppData load(FileReader fileReader) {
-        return null;
-    }
-
-
-}
diff --git a/app/src/main/java/lightcontainer/storage/JsonWriter.java b/app/src/main/java/lightcontainer/storage/JsonWriter.java
deleted file mode 100644
index 56fceb9..0000000
--- a/app/src/main/java/lightcontainer/storage/JsonWriter.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package lightcontainer.storage;
-
-public class JsonWriter implements FileWriter {
-
-    @Override
-    public void writeToFile(String fileName, AppData appData) {
-
-    }
-}
diff --git a/app/src/main/java/lightcontainer/storage/Repository.java b/app/src/main/java/lightcontainer/storage/Repository.java
index b688fc7..6757ff5 100644
--- a/app/src/main/java/lightcontainer/storage/Repository.java
+++ b/app/src/main/java/lightcontainer/storage/Repository.java
@@ -1,8 +1,14 @@
 package lightcontainer.storage;
 
-public interface Repository {
+public class Repository {
 
-    void save(FileWriter fileWriter);
+    //static final String CONFIG_FILE_PATH = "../../resources/config.json";
 
-    AppData load(FileReader fileReader);
+    void save(String filePath, Adapter adapter) {
+
+    }
+
+    AppData load(String filePath, Adapter adapter) {
+        return null;
+    }
 }
diff --git a/app/src/main/java/lightcontainer/storage/User.java b/app/src/main/java/lightcontainer/storage/User.java
index 683fb07..9ba83f2 100644
--- a/app/src/main/java/lightcontainer/storage/User.java
+++ b/app/src/main/java/lightcontainer/storage/User.java
@@ -1,5 +1,7 @@
 package lightcontainer.storage;
 
+import java.util.HashMap;
+import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
 
@@ -36,8 +38,8 @@ public class User {
         return aesKey;
     }
 
-    public Set<Map.Entry<String, File>> getFilesIterator() {
-        return files.entrySet();
+    public Iterator<File> fileIterator() {
+        return files.values().iterator();
     }
 
     public File getFile(String fileName) {
@@ -48,13 +50,8 @@ public class User {
      * @param file The file to add.
      * @return False if a file with the same name already exists. Otherwise, adds the file and returns true.
      */
-    public boolean addFile(File file) {
-        if (this.files.containsKey(file.getName())) {
-            return false;
-        } else {
-            this.files.put(file.getName(), file);
-            return true;
-        }
+    public void addFile(File file) {
+        this.files.put(file.getName(), file);
     }
 
     /**