External storage (Fritz NAS) via FTP not working properly

Nextcloud version _18.0.3:
Operating system and version Win 10
PHP version 7.3.14

The issue you are facing:

I can connect to the Fritz.NAS via FTP. But I can see only one folder (Pictures) and one file readme.md but everything else is missing. It seems to sync, but nothing happens. Especialy I’m missing the via USB attached HDD, where all my data is on, to transfer it to nextcloud. This HDD (Fritz.NAS) should remain as a kind of Backup/Hot standby/Raid System. Of course with an automatic sync or other solutions.

The output of Nextcloud log in Admin > Logging:


to big. can I upload attachements?

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):


there is no /path/to/nextcloud directory

The output of your Apache/nginx/system log in `/var/log/____`: