diff --git a/app.py b/app.py
index c6b8e17..cf988a2 100644
--- a/app.py
+++ b/app.py
@@ -9,6 +9,7 @@ import logging
 import threading
 import subprocess
 import time
+import posixpath
 import uuid as _uuid_mod
 import urllib.request as _urlreq
 import urllib.error   as _urlerr
@@ -903,6 +904,33 @@ def _join_remote_path(*parts) -> str:
     return '/'.join(str(p).strip('/') for p in parts if str(p).strip('/'))
 
 
+def _remote_exists(remote_path: str) -> bool:
+    r = _rclone('lsjson', remote_path, timeout=20)
+    if r.returncode != 0:
+        return False
+    try:
+        data = json.loads(r.stdout or '[]')
+        return bool(data)
+    except (json.JSONDecodeError, ValueError):
+        return bool(r.stdout.strip())
+
+
+def _remote_unique_rel_path(t: dict, rel_path: str) -> str:
+    if not _remote_exists(_smb_conn(t, rel_path)):
+        return rel_path
+
+    parent = posixpath.dirname(rel_path)
+    name = posixpath.basename(rel_path)
+    stem, suffix = posixpath.splitext(name)
+    i = 1
+    while True:
+        candidate_name = f'{stem}_({i}){suffix}'
+        candidate = _join_remote_path(parent, candidate_name)
+        if not _remote_exists(_smb_conn(t, candidate)):
+            return candidate
+        i += 1
+
+
 def _smb_conn(t: dict, path: str = '') -> str:
     """Baut ein rclone-Ziel fuer gespeicherte SMB-Targets.
 
@@ -989,9 +1017,12 @@ def run_uploads(local_dir: Path, cfg: dict):
         add_log(f'Upload >> {name}...')
         dest_root = t.get('dest_path', 'PiCopy').strip('/')
         root = _smb_conn(t)
-        dest = _smb_conn(t, dest_root)
+        # local_dir ist der lokal erzeugte Datumsordner. Auf dem NAS soll die
+        # gleiche Struktur entstehen wie auf dem Ziellaufwerk: Ziel/Datum/...
+        dest_rel = _join_remote_path(dest_root, local_dir.name)
+        dest = _smb_conn(t, dest_rel)
         share = t.get('smb_share', '')
-        dest_label = f'{share}/{dest_root}' if share and dest_root else (share or dest_root or '/')
+        dest_label = _join_remote_path(share, dest_rel) or '/'
         add_log(f'Upload {name}: Ziel {dest_label}')
 
         # Quellverzeichnis prüfen
@@ -1020,11 +1051,36 @@ def run_uploads(local_dir: Path, cfg: dict):
 
         # 3. Kopieren
         add_log(f'Upload {name}: starte copy von {local_dir}')
-        r = _rclone('copy', str(local_dir), dest,
-                    '--create-empty-src-dirs',
-                    '--transfers', '1',
-                    '--retries', '1',
-                    timeout=7200)
+        dup_mode = cfg.get('duplicate_handling', 'skip')
+        if dup_mode == 'rename':
+            errors = []
+            for f in sorted(local_dir.rglob('*')):
+                if not f.is_file():
+                    continue
+                rel = f.relative_to(local_dir).as_posix()
+                remote_rel = _remote_unique_rel_path(t, _join_remote_path(dest_rel, rel))
+                rr = _rclone('copyto', str(f), _smb_conn(t, remote_rel),
+                             '--retries', '1', timeout=7200)
+                if rr.returncode != 0:
+                    errors.append(rr.stderr.strip() or f'{rel}: unbekannter Fehler')
+                    if len(errors) >= 5:
+                        break
+            r = subprocess.CompletedProcess(
+                args=['rclone', 'copyto'],
+                returncode=1 if errors else 0,
+                stdout='',
+                stderr='\n'.join(errors),
+            )
+        else:
+            copy_args = [
+                'copy', str(local_dir), dest,
+                '--create-empty-src-dirs',
+                '--transfers', '1',
+                '--retries', '1',
+            ]
+            if dup_mode == 'skip':
+                copy_args.append('--size-only')
+            r = _rclone(*copy_args, timeout=7200)
         ok  = r.returncode == 0
         err = ''
         if not ok:
diff --git a/version.txt b/version.txt
index de0434d..c301979 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.47
\ No newline at end of file
+1.0.48
\ No newline at end of file