I use autofs for all my shared drives. Export the drive on the Pi4 with nfs-server and mount it under /mnt on the Pi3 and TVHeadend should be able to see it and write to it. You may need to reboot both Pis after setting this up.
I use autofs for all my shared drives. Export the drive on the Pi4 with nfs-server and mount it under /mnt on the Pi3 and TVHeadend should be able to see it and write to it. You may need to reboot both Pis after setting this up.