Need help with one of the snapshot options

Greetings need help with this, Im confuse with these two options, wich you recomend, i have set up common files options, but whem i hit selected files i have an option of most of common files and wp-config.php .htaccess files so my question is the option common files is making backup of those 2 files

wp-config.php
htaccess

Please Adivse
Regards
Alex