For NAS 2 – you give “EVERYONE” “read” permission.
(Apply to folder, sub-folders, and files)
You also create the NFS export rule for those shared folders:
It will look like this on NAS 2 (The other NAS holding more media files)

Now you :
- Enable the NFS service if not already done
- NFS mount the NFS 2 shared folder and set to automount at startup.