There are many different file managers available for WordPress, but the easiest way to install one is usually to use the WordPress plugin search. Once you find a suitable plugin, click on the Install Now button to add it to your WordPress site.
Once the plugin is installed, you will need to activate it. To do this, go to the Plugins menu in your WordPress site, and then click on the Activate link next to the file manager plugin you just installed.
Now you can use the plugin to browse and manage your files on your WordPress site. To open the file manager, click on the File Manager link in the WordPress toolbar.
When you’re done using the file manager, close it by clicking on the Close button. You can also disable the plugin by clicking on the Disable link next to it in the WordPress Plugin Menu.
Finally, if you want to keep the file manager plugin around even after you delete the WordPress site, you can export the plugin’s settings and put them into a new WordPress site by clicking on the Export Settings button.