

My setup is exactly what you’re aiming for: Immich and it’s database resides on the main SSD while the photos and videos are uploaded to my NAS using NFS shares and a bind mount to /mnt/
I run Cosmos Cloud so the manner in which it’s implemented may be slightly different to your setup.
It isnt the snappiest experience loading media off the HDD’s but it’s been very reliable.
You know, my thumbnails load super slow on my phone but your comment made me think I should check where the thumbnails are located. First though I noticed I had this setting on, after disabling it they now load almost instantly: