diff --git a/mtda/assets/dropzone.css b/mtda/assets/dropzone.css
new file mode 100644
index 00000000..a332e3f7
--- /dev/null
+++ b/mtda/assets/dropzone.css
@@ -0,0 +1,40 @@
+/* ---------------------------------------------------------------------------
+   Copyright (C) 2024 Siemens AG
+   ---------------------------------------------------------------------------
+   SPDX-License-Identifier: MIT
+   ---------------------------------------------------------------------------
+*/
+
+#dropzone {
+    width: 100%;
+    max-width: 600px;
+    height: 200px;
+    border: 2px dashed #888;
+    border-radius: 10px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    text-align: center;
+    color: #888;
+    font-size: 18px;
+    margin: 20px auto;
+    cursor: pointer;
+}
+
+#dropzone.hover {
+    border-color: #333;
+    color: #333;
+}
+
+button {
+    display: block;
+    margin: 20px auto;
+    padding: 10px 20px;
+    font-size: 16px;
+    cursor: pointer;
+}
+
+button:disabled {
+    cursor: not-allowed;
+    opacity: 0.5;
+}
diff --git a/mtda/constants.py b/mtda/constants.py
index ee74eb0c..e6294576 100644
--- a/mtda/constants.py
+++ b/mtda/constants.py
@@ -66,6 +66,7 @@ class STORAGE:
     ON_TARGET = "TARGET"
     LOCKED = "LOCKED"
     UNLOCKED = "UNLOCKED"
+    OPENED = "OPENED"
     UNKNOWN = "???"
     RETRY_INTERVAL = 0.5
     TIMEOUT = 30
diff --git a/mtda/main.py b/mtda/main.py
index 49d89166..ef5fe43b 100644
--- a/mtda/main.py
+++ b/mtda/main.py
@@ -779,6 +779,7 @@ def storage_open(self, session=None):
             self._storage_opened = True
             self._storage_owner = session
             self._writer.start()
+            self._storage_event(CONSTS.STORAGE.OPENED, session)
             if self.storage is not None:
                 self.storage_locked()
 
diff --git a/mtda/templates/index.html b/mtda/templates/index.html
index d6589607..5dd954a9 100644
--- a/mtda/templates/index.html
+++ b/mtda/templates/index.html
@@ -8,6 +8,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
     <!-- Apple iOS Safari settings -->
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+    <link rel="stylesheet" href="./assets/dropzone.css">
     <link rel="stylesheet" href="./assets/material_icons.css">
     <link rel="stylesheet" href="./assets/modern.min.css">
     <link rel="stylesheet" href="novnc/app/styles/base.css">
@@ -81,6 +82,7 @@
         <ul class="nav">
           <li><a href="#" id=power-toggle><i id=power-status-icon class="large material-icons">power</i></a></li>
           <li><a href="#" id=storage-toggle><i id=storage-status-icon class="large material-icons">no_sim</i></a></li>
+          <li><a href="#" id=storage-write><i id=storage-write-icon class="large material-icons">upload_file</i></a></li>
           <li id="mtda_status">Connecting...</li>
           <li id="vnc_status">Loading Video</li>
           <li id="mtda_version">&nbsp;</li>
@@ -102,6 +104,13 @@
             height: "768px",
             hidden: true,
         });
+        uploadWindow = new WinBox("Upload", {
+            html: "<div id=dropzone>Drag and drop your file here</div><button id='upload' disabled></button>",
+            class: ["no-full", "no-max", "modern"],
+            width: "600px",
+            height: "340px",
+            hidden: true,
+        });
         consoleWindow.focus()
     </script>
     <script src="./assets/jquery.min.js"></script>
@@ -116,6 +125,7 @@
           shift: key.shift,
           alt:   key.alt,
           meta:  key.cmd,
+          session: localStorage.getItem('session')
         }, function(key) {
           // do nothing
         });
@@ -123,7 +133,7 @@
       $(function() {
         $('a#power-toggle').bind('click', function() {
           document.getElementById("power-status-icon").innerHTML = "downloading"
-          $.getJSON('./power-toggle', function(data) {
+          $.getJSON('./power-toggle', {session: localStorage.getItem('session')}, function(data) {
             // do nothing
           });
           return false;
@@ -132,7 +142,24 @@
       $(function() {
         $('a#storage-toggle').bind('click', function() {
           document.getElementById("storage-status-icon").innerHTML = "downloading"
-          $.getJSON('./storage-toggle', function(data) {
+          $.getJSON('./storage-toggle', {session: localStorage.getItem('session')}, function(data) {
+            // do nothing
+          });
+          return false;
+        });
+      });
+      $(function() {
+        $('a#storage-write').bind('click', function() {
+          upload.innerHTML = 'Upload File'
+          uploadWindow.move('center', 'center');
+          uploadWindow.toggleClass('modal');
+          uploadWindow.show();
+          uploadWindow.focus();
+        });
+      });
+      $(function() {
+        $('#upload').bind('click', function() {
+          $.getJSON('./storage-open', {session: localStorage.getItem('session')}, function(data) {
             // do nothing
           });
           return false;
@@ -207,6 +234,10 @@
         status.innerHTML = '<span style="color: #ff8383;"><b>Disconnected</b></span>';
       });
 
+      socket.on("session", (data) => {
+        localStorage.setItem('session', data.id);
+      });
+
       socket.on("power-event", (data) => {
         switch(data.event) {
           case 'ON': power_status.innerHTML = "power_off"; break;
@@ -235,11 +266,75 @@
             storage_status.innerHTML = "no_sim";
             storage_status.title = data
             break;
+          case 'OPENED':
+            if (localStorage.getItem('session') == data) {
+              if (selectedFile) {
+                upload.innerHTML = 'Uploading...'
+                uploadSelectedFile();
+              }
+            }
+            break;
           default:
             storage_status.innerHTML = "unknown_document"
             storage_status.title = "storage status unknown"
         }
       });
+      const CHUNK_SIZE = 512 * 1024;
+      const dropzone = document.getElementById('dropzone');
+      const upload = document.getElementById('upload');
+      let selectedFile = null;
+
+      ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
+        dropzone.addEventListener(eventName, (e) => e.preventDefault());
+      });
+
+      ['dragenter', 'dragover'].forEach(eventName => {
+        dropzone.addEventListener(eventName, () => dropzone.classList.add('hover'));
+      });
+
+      ['dragleave', 'drop'].forEach(eventName => {
+        dropzone.addEventListener(eventName, () => dropzone.classList.remove('hover'));
+      });
+
+      dropzone.addEventListener('drop', (event) => {
+        const files = event.dataTransfer.files;
+        if (files.length) {
+          selectedFile = files[0];
+          dropzone.textContent = `${selectedFile.name}`;
+          upload.disabled = false;
+        }
+      });
+
+      function delay(ms) {
+        return new Promise(resolve => setTimeout(resolve, ms));
+      }
+
+      async function uploadSelectedFile() {
+        const sendFileInChunks = (file) => {
+          let offset = 0;
+          const reader = new FileReader();
+
+          const readNextChunk = () => {
+            const slice = file.slice(offset, offset + CHUNK_SIZE);
+            reader.readAsArrayBuffer(slice);
+          };
+
+          reader.onload = async (event) => {
+            socket.emit("storage-write", { data: event.target.result });
+            offset += CHUNK_SIZE;
+            await delay(10);
+
+            if (offset < file.size) {
+              readNextChunk();
+            } else {
+              socket.emit("storage-close", { });
+              uploadWindow.hide();
+            }
+          };
+          readNextChunk();
+        };
+        await sendFileInChunks(selectedFile);
+      };
     </script>
   </body>
 </html>
diff --git a/mtda/www.py b/mtda/www.py
index ad5c695c..478e2728 100644
--- a/mtda/www.py
+++ b/mtda/www.py
@@ -44,16 +44,18 @@ def connect():
     session['id'] = uuid.uuid4().hex
     mtda = app.config['mtda']
     if mtda is not None:
+        socket.emit("session", {"id": session['id']}, namespace="/mtda")
+
         version = mtda.agent_version()
         socket.emit("mtda-version", {"version": version}, namespace="/mtda")
 
         data = mtda.console_dump()
         socket.emit("console-output", {"output": data}, namespace="/mtda")
 
-        power = mtda.target_status(session_id())
+        power = mtda.target_status(session['id'])
         socket.emit("power-event", {"event": power}, namespace="/mtda")
 
-        status, _, _ = mtda.storage_status(session_id())
+        status, _, _ = mtda.storage_status(session['id'])
         socket.emit("storage-event", {"event": status}, namespace="/mtda")
 
         if mtda.video is not None:
@@ -116,7 +118,7 @@ def keyboard_input():
 
 @app.route('/power-toggle')
 def power_toggle():
-    sid = session_id()
+    sid = request.args.get('session')
     mtda = app.config['mtda']
     if mtda is not None:
         return mtda.target_toggle(session=sid)
@@ -125,7 +127,7 @@ def power_toggle():
 
 @app.route('/storage-toggle')
 def storage_toggle():
-    sid = session_id()
+    sid = request.args.get('session')
     mtda = app.config['mtda']
     if mtda is not None:
         status, _, _ = mtda.storage_status(session=sid)
@@ -137,6 +139,35 @@ def storage_toggle():
     return ''
 
 
+@app.route('/storage-open')
+def storage_open():
+    sid = request.args.get('session')
+    mtda = app.config['mtda']
+    if mtda is not None:
+        mtda.storage_open(session=sid)
+    return ''
+
+
+@socket.on("storage-close", namespace="/mtda")
+def storage_close(data):
+    sid = request.args.get('session')
+    mtda = app.config['mtda']
+    if mtda is not None:
+        mtda.storage_close(sid)
+        mtda.storage_to_target(sid)
+    return ''
+
+
+@socket.on("storage-write", namespace="/mtda")
+def storage_write(data):
+    sid = session_id()
+    mtda = app.config['mtda']
+    if mtda is not None:
+        data = data['data']
+        mtda.storage_write(data, sid)
+    return ''
+
+
 def session_id():
     sid = None
     if 'id' in session: