Why do you need the files in your local?
Is your network that slow?
I’ve heard of multiple content creators which have their video files in their NAS to share between their editors, and they work directly from the NAS.
Could you do the same? You’ll be working with music, so the network traffic will be lower than with video.
If you do this you just need a way to mount the external directory, either with rclone or with sshfs.
The disks on my NAS go to sleep after 10 minutes idle time and if possible I would prefer not waking them up all the time
I think this is a good strategy to not put additional stress in your drives (as a non-expert of NAS), but I’ve read the actual wear and tear of the drives is mostly during this process of spinning up and down. That’s why NAS drives should be kept spinning all the time.
And drives specifically built for NAS setups are designed with this in mind.
That’s a weird read having in mind I had to move to Wayland because x11 had severe screen tearing. I would have guessed Wayland had better support.