how do i move files?

just backing up my database before I do some work on my site, but the plugin is telling me that;

Your backup folder MIGHT be visible to the public

To correct this issue, move the .htaccess file from wp-content/plugins/wp-dbmanager to /home4/eversost/public_html/wp-content/backup-db

how the blazes do I move files?

thanks you lovely bunch!