This i with --checksum
2023/03/14 19:15:39 DEBUG : rclone: Version "v1.61.1" starting with parameters ["rclone" "sync" "W:serverbackup/3g.jpg" "H2:serverbackup/" "--checksum" "-vv" "--progress" "--create-empty-src-dirs" "--checkers" "4" "--transfers" "4"]
2023/03/14 19:15:39 DEBUG : Creating backend with remote "W:serverbackup/3g.jpg"
2023/03/14 19:15:39 DEBUG : Using config file from "/root/.config/rclone/rclone.conf"
2023/03/14 19:15:39 DEBUG : fs cache: adding new entry for parent of "W:serverbackup/3g.jpg", "W:serverbackup"
2023/03/14 19:15:39 DEBUG : Creating backend with remote "H2:serverbackup/"
2023/03/14 19:15:39 DEBUG : sftp://XXXXXX@XXXXXX.your-storagebox.de:23/serverbackup/: New connection xxx.xxx.xxx.xxx:44948->xxx.xxx.xxx.xxx:xxx to "SSH-2.0-OpenSSH_8.8 FreeBSD-20211221"
2023/03/14 19:15:39 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/serverbackup/: Shell type "unix" from config
2023/03/14 19:15:39 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/serverbackup/: Relative path resolved to "/home/serverbackup"
2023/03/14 19:15:39 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/serverbackup/: Using root directory "/home/serverbackup"
2023-03-14 19:15:39 DEBUG : 3g.jpg: Need to transfer - File not found at Destination
2023-03-14 19:15:40 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/Serverbackup/: Shell path "/home/serverbackup/3g.jpg"
2023-03-14 19:15:40 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/serverbackup/: Running remote command: md5 -r /home/serverbackup/3g.jpg
2023-03-14 19:15:40 DEBUG : sftp://xxxxx@xxxxx.your-storagebox.de:23/serverbackup/: Remote command result: 23bc4b82be36caf0eead1b2986xxxxxx /home/serverbackup/3g.jpg
2023-03-14 19:15:40 DEBUG : 3g.jpg: Parsed hash: 23bc4b82be36caf0eead1b2986xxxxxx
2023-03-14 19:15:40 DEBUG : 3g.jpg: md5 = 23bc4b82be36caf0eead1b2986xxxxxx OK
2023-03-14 19:15:40 INFO : 3g.jpg: Copied (new)
Transferred: 763.928 KiB / 763.928 KiB, 100%, 0 B/s, ETA -
Transferred: 1 / 1, 100%
Elapsed time: 0.7s
2023/03/14 19:15:40 INFO :
Transferred: 763.928 KiB / 763.928 KiB, 100%, 0 B/s, ETA -
Transferred: 1 / 1, 100%
Elapsed time: 0.7s