Simple Fullscreen Responsive Slider is an easy-to-use, lightweight, responsive, fullscreen slider that supports MultiPostThumbnails and custom CSS.

Noted That:

To install correctly this simple-fullscreen-responsive-slider.zip.
Fisrt Download the simple-fullscreen-responsive-slider.zip to your computer
Extract/Open simple-fullscreen-responsive-slider.zip to Your Computer.
Then, Find readme.txt file inside simple-fullscreen-responsive-slider.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "simple-fullscreen-responsive-slider.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "simple-fullscreen-responsive-slider.zip" Downloaded plugin from your computer, Where you downloaded simple-fullscreen-responsive-slider.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Simple Fullscreen Responsive Slider" folder is added on left sidemenu. Now, Click on "Simple Fullscreen Responsive Slider" folder.

Noted that: If you do not see "Simple Fullscreen Responsive Slider" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Simple Fullscreen Responsive Slider Configurtions and Settings or How to work "Simple Fullscreen Responsive Slider" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Simple Fullscreen Responsive Slider" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Simple Fullscreen Responsive Slider
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
INSTALLING THE PLUGIN The plugin can be installed and activated in the usual fashion. See Managing Plugins if you need help with this. ADDING THE CODE You will need to manually edit your theme and insert the following code to display the slider. This is typically added after your opening body or header tag and it will only work on your front page. The slider will not display properly if this is wrapped in additional tags. SAVING THE OPTIONS Lastly, you will need to, at a minimum, visit the slider options page and save the default options to the options database. You can do this from the newly created “Settings > Slider Options” page. From here, you can style the slider by customizing the default CSS. As this plugin is designed for other developers the default CSS is quite basic.

INSTALLING THE PLUGIN

The plugin can be installed and activated in the usual fashion. See
Managing
Plugins if you need help with this.

ADDING THE CODE

You will need to manually edit your theme and insert the following code to display
the slider. This is typically added after your opening body or header tag and
it will only work on your front page. The slider will not display properly if
this is wrapped in additional tags.

SAVING THE OPTIONS

Lastly, you will need to, at a minimum, visit the slider options page and save
the default options to the options database. You can do this from the newly
created “Settings > Slider Options” page. From here, you can style the slider
by customizing the default CSS. As this plugin is designed for other developers
the default CSS is quite basic.

slider, responsive, fullscreen, multipostthumbnails, custom, supports, easy, simple, lightweight,

Name
How to add Cf7 Mce in Wordpress
How to add Wp Access Areas in Wordpress
How to add Wp File Permission Check in Wordpress
How to add Emoji Autocomplete Gutenberg in Wordpress
How to add Markdown Editor in Wordpress

Reffered: https://wordpress.org/