diff --git a/android/src/screens/ChatScreen.tsx b/android/src/screens/ChatScreen.tsx
index 99faf84..c8a1cfb 100644
--- a/android/src/screens/ChatScreen.tsx
+++ b/android/src/screens/ChatScreen.tsx
@@ -888,6 +888,16 @@ const ChatScreen: React.FC = () => {
         const b64 = (message.payload.base64 as string) || '';
         const serverPath = (message.payload.serverPath as string) || '';
         const mimeType = (message.payload.mimeType as string) || '';
+        // Fehler-Response (z.B. Datei zu gross, nicht gefunden) → Toast,
+        // kein erneuter Versuch. Hauptverdacht: 40+ MB Videos die ueber
+        // den 70 MB Bridge-Limit gehen.
+        const fileErr = (message.payload as any).error as string | undefined;
+        if (fileErr) {
+          const fname = (message.payload.name as string) || serverPath.split('/').pop() || 'Datei';
+          console.warn('[Chat] file_response Fehler fuer %s: %s', fname, fileErr);
+          ToastAndroid.show(`${fname}: ${fileErr}`, ToastAndroid.LONG);
+          return;
+        }
         if (b64 && reqId) {
           const fileName = (message.payload.name as string) || 'download';
           persistAttachment(b64, reqId, fileName).then(filePath => {
diff --git a/bridge/aria_bridge.py b/bridge/aria_bridge.py
index f4da5b5..3eba639 100644
--- a/bridge/aria_bridge.py
+++ b/bridge/aria_bridge.py
@@ -1478,8 +1478,11 @@ class ARIABridge:
             try:
                 url = f"{current_url}?token={self.rvs_token}"
                 logger.info("[rvs] Verbinde: %s", current_url)
-                # max_size=50MB (siehe core-Connect oben — gleicher Grund).
-                async with websockets.connect(url, max_size=50 * 1024 * 1024) as ws:
+                # max_size=100MB synchron zum RVS-Server (siehe rvs/server.js).
+                # File-Re-Download fuer Anhaenge braucht Platz fuer base64-
+                # inflate (~1.33×). Groessere Files lehnt der file_request-
+                # Handler proaktiv ab bevor's zur 1009-Disconnection kommt.
+                async with websockets.connect(url, max_size=100 * 1024 * 1024) as ws:
                     self.ws_rvs = ws
                     retry_delay = 2
                     logger.info("[rvs] Verbunden — warte auf App-Nachrichten")
@@ -2204,6 +2207,33 @@ class ARIABridge:
                     "timestamp": int(asyncio.get_event_loop().time() * 1000),
                 })
                 return
+            # Groessen-Check VOR base64-Encode + Send. Sonst zerreisst's bei
+            # grossen Files (>~70 MB binaer) die WebSocket-Verbindung mit
+            # Code 1009 (message too big) — RVS-Server droppt, Bridge crasht
+            # im cleanup (websockets-Lib-Bug). Limit deckt typische Videos
+            # und Bilder ab; alles drueber soll der User per SSH abholen.
+            FILE_MAX_BYTES = 70 * 1024 * 1024
+            try:
+                file_size = os.path.getsize(server_path)
+            except OSError as exc:
+                logger.warning("[rvs] getsize fehlgeschlagen: %s", exc)
+                file_size = 0
+            if file_size > FILE_MAX_BYTES:
+                logger.warning("[rvs] Re-Download abgelehnt: %s zu gross (%dMB > %dMB)",
+                               server_path, file_size // (1024 * 1024),
+                               FILE_MAX_BYTES // (1024 * 1024))
+                await self._send_to_rvs({
+                    "type": "file_response",
+                    "payload": {
+                        "requestId": req_id,
+                        "serverPath": server_path,
+                        "name": os.path.basename(server_path),
+                        "error": f"Datei zu gross fuer Transfer ({file_size // (1024 * 1024)} MB, Limit {FILE_MAX_BYTES // (1024 * 1024)} MB)",
+                        "sizeBytes": file_size,
+                    },
+                    "timestamp": int(asyncio.get_event_loop().time() * 1000),
+                })
+                return
             with open(server_path, "rb") as f:
                 file_b64 = base64.b64encode(f.read()).decode("ascii")
             mime, _ = mimetypes.guess_type(server_path)
diff --git a/rvs/server.js b/rvs/server.js
index e001c3c..fd7f573 100644
--- a/rvs/server.js
+++ b/rvs/server.js
@@ -71,10 +71,14 @@ function cleanupRooms() {
 
 // ── WebSocket-Server starten ────────────────────────────────────────
 
-// maxPayload 50MB: TTS-Streaming + Voice-Upload (WAV als base64) +
+// maxPayload 100MB: TTS-Streaming + Voice-Upload (WAV als base64) +
 // audio_pcm Chunks koennen die ws-Library Default 1MB ueberschreiten.
-// Default-Limit war der Killer fuer die voice_upload Pipeline.
-const wss = new WebSocketServer({ port: PORT, maxPayload: 50 * 1024 * 1024 });
+// Plus: file_request/file_response fuer Re-Download von Anhaengen.
+// 40 MB MP4 → ~53 MB base64 → vorher mit 50 MB Limit zerschossen
+// (Code 1009 message too big, Bridge crashed im cleanup). 100 MB
+// deckt bis ~70 MB binaer ab; groessere Files werden Bridge-seitig
+// abgewiesen (siehe file_request-Handler) bevor die WS abreisst.
+const wss = new WebSocketServer({ port: PORT, maxPayload: 100 * 1024 * 1024 });
 
 wss.on("listening", () => {
   log(`RVS läuft auf Port ${PORT} | Max Sessions: ${MAX_SESSIONS}`);