I have a problem with folder bfi-thumb since it is huge and it takes up my webspace on server (hostgator).
So I found (did not try it yet) a solution on the web:
To switch off the bfi\_thumb function, you need to set Image Height value to 0 in Theme Options > Blog > Blog Archive and regenerate images with the plugin [https://wordpress.org/plugins/regenerate-thumbnails/]) .
Do I set image height 0, or I leave it blank?
Now my question is, what will this things do to my existing posts? Will everything work?