diff --git a/backend/routes/portal_services.py b/backend/routes/portal_services.py
index 23dfed0..6718bac 100644
--- a/backend/routes/portal_services.py
+++ b/backend/routes/portal_services.py
@@ -1,4 +1,8 @@
 from flask import Blueprint, render_template, session, redirect, url_for, flash
+import hmac, hashlib, time, urllib.parse, os
+
+OTB_PORTAL_SHARED_SECRET = os.getenv("OTB_PORTAL_SHARED_SECRET", "!2Eas678")
+OTB_CLOUD_URL = os.getenv("OTB_CLOUD_URL", "https://otb-cloud.outsidethebox.top")
 
 portal_services_bp = Blueprint("portal_services", __name__)
 
@@ -37,7 +41,7 @@ def portal_services_home():
             "summary": "Create and manage your GPS tracking network. Free for up to 2 users.",
             "status": "beta",
             "enabled": True,
-            "href": "https://follow-me.outsidethebox.top",
+            "href": "/portal/services/follow-me-launch",
             "button_text": "Open Follow-me",
         },
         {
@@ -49,6 +53,15 @@ def portal_services_home():
             "href": "#",
             "button_text": "Coming Soon",
         },
+        {
+            "key": "otb_cloud",
+            "name": "OTB Cloud Backup & Storage",
+            "summary": "Secure backup and storage for documents, photos, videos, and device uploads.",
+            "status": "beta",
+            "enabled": True,
+            "href": "/portal/services/otb-cloud-launch",
+            "button_text": "Open OTB Cloud",
+        },
         {
             "key": "miner_rentals",
             "name": "Miner Rentals",
@@ -66,3 +79,44 @@ def portal_services_home():
         client_name=client_name,
         services=services,
     )
+
+
+def build_otb_cloud_handoff_url(uid, email):
+    ts = str(int(time.time()))
+    payload = f"{uid}|{email}|{ts}".encode("utf-8")
+    sig = hmac.new(
+        OTB_PORTAL_SHARED_SECRET.encode(),
+        payload,
+        hashlib.sha256
+    ).hexdigest()
+
+    query = urllib.parse.urlencode({
+        "uid": uid,
+        "email": email,
+        "ts": ts,
+        "sig": sig,
+    })
+
+    return f"{OTB_CLOUD_URL}/auth/handoff?{query}"
+
+
+@portal_services_bp.route("/portal/services/otb-cloud-launch")
+def portal_launch_otb_cloud():
+    if not _portal_user_is_logged_in():
+        flash("Please sign in to access services.", "warning")
+        return redirect(url_for("portal_login"))
+
+    uid = (
+        session.get("portal_user_id")
+        or session.get("client_id")
+        or session.get("user_id")
+    )
+
+    email = (
+        session.get("portal_email")
+        or session.get("email")
+        or "unknown@example.com"
+    )
+
+    url = build_otb_cloud_handoff_url(uid, email)
+    return redirect(url)