https://quidsup.net/tutorials/?p=nfs

https://www.htpcguides.com/configure-nfs-server-and-nfs-client-raspberry-pi/

Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems in 1984,
allowing a user on a client computer to access files over a computer network much like local storage is accessed.

Configure NFS Server

Install NFS server components

sudo apt-get install nfs-common nfs-server -y

Create the nfs server shared folder, you can use an existing folder as well

sudo mkdir /var/nfs

give the mount point you just created liberal permissions.

sudo chmod -R 777 /var/nfs

sudo service nfs-kernel-server stop

sudo service nfs-kernel-server start

Open the NFS exports file where you configure the paths to share and their permissions

sudo nano /etc/exports

/var/nfs *(rw,sync,no_root_squash,subtree_check)

Tell NFS to read your newly created exports file

sudo exportfs

Configure NFS Client

sudo mount 192.168.180.180:/var/album /home/nishant/nishant/photo_frame/pics

sudo nano /etc/fstab

192.168.180.180:/var/album /home/nishant/nishant/photo_frame/pics   nfs      rw,sync,hard,intr  0     0

sudo nano /lib/systemd/system/mount-nfs.service

[Unit]
Description=Mount NFS folder

[Service]
Environment=DISPLAY=:0
Environment=XAUTHORITY=/home/pi/.Xauthority
ExecStart=sudo mount -a
Restart=always
RestartSec=10s
KillMode=process
TimeoutSec=infinity

[Install]
WantedBy=graphical.target

sudo systemctl daemon-reload
sudo systemctl enable mount-nfs.service