diff --git a/app.py b/app.py
index b3ea19c..6f6ada6 100644
--- a/app.py
+++ b/app.py
@@ -950,18 +950,26 @@ def run_uploads(local_dir: Path, cfg: dict):
             upload_state['current'] = name
 
         add_log(f'Upload >> {name}...')
+        remote  = _remote_name(t['id'])
         dest_root = t.get('dest_path', 'PiCopy').strip('/')
-        dest = f'{_remote_name(t["id"])}:{dest_root}'
+        dest = f'{remote}:{dest_root}'
 
-        # Zielordner anlegen falls nicht vorhanden
-        mk = _rclone('mkdir', dest, timeout=30)
-        if mk.returncode != 0:
-            err = mk.stderr.strip().splitlines()[-1] if mk.stderr.strip() else 'Ordner konnte nicht angelegt werden'
-            add_log(f'Upload {name}: ✗ {err}')
+        # 1. Verbindung prüfen
+        conn = _rclone('lsd', f'{remote}:', timeout=15)
+        if conn.returncode != 0:
+            lines = [l for l in conn.stderr.strip().splitlines() if l.strip()]
+            err = lines[-1] if lines else 'NAS nicht erreichbar'
+            add_log(f'Upload {name}: ✗ NAS nicht erreichbar - {err}')
+            add_log(f'Upload {name}: Hinweis: Prüfe ob VPN aktiv ist und den NAS blockiert')
             with upload_lock:
-                upload_state['results'].append({'name': name, 'ok': False, 'msg': err})
+                upload_state['results'].append({'name': name, 'ok': False,
+                    'msg': f'NAS nicht erreichbar (VPN aktiv?): {err}'})
             continue
 
+        # 2. Zielordner anlegen
+        _rclone('mkdir', dest, timeout=30)
+
+        # 3. Kopieren
         r = _rclone('copy', str(local_dir), dest,
                     '--create-empty-src-dirs',
                     '--retries', '2',
diff --git a/version.txt b/version.txt
index 8ef0958..61dbbb3 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.41
\ No newline at end of file
+1.0.42
\ No newline at end of file