- Go to settings – media and set all sizes to 0
- If you uye a them like totzal theme disale the additional image sizes option since you only want the native original one.
- Install the force regenerate thumbnails plugin since this is the only one wich also deletes the now unnecessary image sizes
- head to your functions.php and add this line of code to also remove the new wordpress core hidden image size 768px (read more)
add_filter( 'intermediate_image_sizes', '__return_empty_array', 999 );
- Go to tools – force rgenerate thumbnails and regenerate everything.