How I do I host a simple html file through wordpress? (see details) [closed]

You can use this plugin “File Manager” – https://wordpress.org/plugins/file-manager/, you will need to have the requirements below:

PHP 5.2+
Firefox 12+
Google Chrome / Chromium 19+
Internet Explorer 9+
Opera 12+
Safari 6
Mogrify Utility (Optional)
GD / Imagic (Optional)