Transfer files between Ubuntu & Windows OS under same LAN

On Linux:

sudo apt install samba
sudo smbpasswd -a <username>
mkdir /home/<username>/UbuntuSharedDir
sudo nano /etc/samba/smb.conf

Add the following lines at the end of the file:

[UbuntuSharedDir]
path = /home/<username>/UbuntuSharedDir
available = yes
valid users = <username>
read only = no
browsable = yes
public = yes
writable = yes
sudo service smbd restart

Grab your Ubuntu IP address using ifconfig command

On Windows:

Go to Run and type:

\\<Ubuntu_IP_Address>\UbuntuSharedDir