I can't listen FLACs on NAS extension Qnap

[Bertrand]

Hello everibody,
I have a QNap model TS 251+ NAS since 2019 and can play FLAC music files using MinimServer.The hard drives of the QNap TS 251+ NAS will soon be full. Also I recently bought an extension of the same QNap brand, the TR-002 model, which is connected to the NAS by a USB3 socket.
I can now access the hard drives of the QNap TR-002 extension through the file explorer on my Windows 10 PC. However, I cannot access the music files on the extension and cannot listen to them. I can't access it.
On the NAS too I also had to download in addition to the download on my PC MinimServer .
What would I need to do to be able to play the music files that are on the QNap TR-002 extension?
Should MinimServer be installed on the QNap TR-002 extension?
Could I add the QNap TR-002 location to the current MinimServer analysis location and how?
Can you tell me how to proceed to be able to play the FLAC music files that are on the QNap TR-002 extension?
Thank you in advance for your solutions.