Thanks to your answers!
I finally got Linux Mint 19.3 Xfce Edition installed! And there is NTFS support out of the box. I can see all my DATA and have Access to the files. That ist very nice!
However the Installation was a bit tricky because after rebooting I saw a black screen with blinking Cursor in the left Corner. THe other time I saw a GRUB screen. First time for me, and I am no Linux professional so I decided to reinstall MiNt again.
This time I manually formatted the disk and manually created mountpoints for root and swap. And it finally worked!

After the OS Installation I downloaded yesterday evening the new Serviio 2.0 Version, installed all the necessary packages (openjdk-8-jre default-jre ffmpeg ….), and configured a Service so that Serviio starts automatically when the Systems boots.
That works and is great! I can even Access the web URL:
http://(IPaddress):23423/console and the mediabrowser:
http://<pc5dczc_pc_ip_address>:23424/mediabrowser. No Problems so far!
But there is a strange phenomenon: From all of our DLNA Clients (TV, XBOX, serviigo APP on Android, MediaBrowser) we only see the Thumbnails of the Audio Album for example, but no Content! We cannot use the search functionality too!
For better understanding, if i use the serviigo App (in most sitations we use this app for Access to all the Audio data on the nas and stream to the Receiver via Bluetooth):
--> Albums: No Content
--> Artists: Listed with Thumbnails in alphabetically order. But if i press on that Picture --> No Content!
--> Album Artists: Same as Artists!
--> Folders: No Content! (worked before!)
--> Genres: No Content! (worked before!)
So there is no Content (most Audio files are mp3 files) and i am not able to Play my Music.
Is that some Kind of permission Problem because all of my data is stored on a NTFS formatted disk?
Or is that a Problem because I installed Serviio on a 32 Bit Linux Mint OS? I have read something About "Only 64-bit OSX machines are supported, with OSX 10.8 Minimum" ?? But I can Access the Web URL and everything seems to run smooth.
Thank you very much!