FTP Push errors (Scale to Synology)

Hello everyone, I am trying to mirror my Scale server to a Synology DS box (3rd redundant backup). After fiddling around with rsync and sftp without much success, I settled for FTP Sync in Push mode from Scale to Synology. At first glance, it seems to work (good performance, files seem to be there), however the log shows a lot of errors I do not understand. Any help is appreciated.

Summary:

<3>ERROR : ftp://192.168.178.3:21/DS120BACKUP: not deleting files as there were IO errors
<3>ERROR : ftp://192.168.178.3:21/DS120BACKUP: not deleting directories as there were IO errors
<3>ERROR : Attempt 3/3 failed with 374 errors and: march failed with 82 error(s): first error: list: dirExists: unsupported LIST line
Failed to sync with 374 errors: last error was: march failed with 82 error(s): first error: list: dirExists: unsupported LIST line

Errors:

  1. Can I prevent FTP from trying to copy hidden files?
    .system/samba4/private/msg.sock/1337: Can’t transfer non file/directory

  2. dirExists / unsupported LIST line
    musicVault/Beethoven Alban Berg Quartet/Beethoven_ Complete String Quartets [Disc 1]: error reading destination directory: list: dirExists: unsupported LIST line

  3. update getinfo / unsupported LIST line
    localMirror/data/ShiVa/ShiVaProjects/shiva-brainslugs/Profiles/com.shiva.editor.default/com.shiva.editor.settings.desktops/desktop[2].xml: Failed to copy: update getinfo: unsupported LIST line

  4. failed to remove partial copy / unsupported LIST line
    localMirror/data/Philipp/Livestream-Konzert.mp4.yudajop3.partial: Failed to remove failed partial copy: unsupported LIST line

  5. prevent copying of the wastebin
    localMirror/data/#recycle/some/directory/here