Cant play music from USB disk

Hi.

Can anybody help with following topic.
When running Mac Mini2014 with catalina OS X 10.15.7 the LMS server works fine when music library is on internal disk (1TB SSD).
When i attach a USB disk to the Mac and add the USB disk to the music library
/Users/macmini2014/Music/itunes/iTunesMusic <--internal disk and music plays fine from this folder.
/Volumes/MUSIC1 <-- USB disk

When I make a rescan of the library then the library on the USB disk is shown as EMTY in the LMS.(See Attachment) The USB disk do include music files.(see attachment)

I have tried same with two other USB disks and with same "empty" result.

I have just replaced the mac Mini from a 2009version running "El Capitan" and the old Mac mini did see the USB disk library.

I have already searched the forum regarding this'd can see that there is topics with MAX OS X Catalina and not attaching the music library. My Problem is only the USB disk can't be attached so i don't believe thesis the problem or?

I Hope some one can guide me to get this working again.
My systems setup as follow.

Logitech Media Server Version: 8.1.1 - 1610364019 @ Thu Jan 14 06:19:27 CET 2021
Hostname: Mac-mini.local
Server IP Address: 192.168.0.129
Server HTTP Port Number: 9000
Operating system: macOS 10.15.7 - EN - utf8
Platform Architecture: x86_64
Perl Version: 5.18.4 - darwin-thread-multi-2level
Audio::Scan: 1.02
IO::Socket::SSL: 2.066
Database Version: DBD::SQLite 1.58 (sqlite 3.22.0)

As player Im using a Raspberry pi3B+ with Picore layer 7.0 installed.

Best
CAAD

Attached Images