I have installed a plugin that tells me this :
You have more .htaccess files in your system than expected. You are running Apache and should have, at most, 1 .htaccess files in your WordPress install. WP-MalWatch located 3 .htaccess files. You can find them in the following directories:
Should I worry? Is this a problem to have 3 .htaccess files? Thank you for your help!