Server path to "members" folder. This folder MUST be outside of your web root for security and not accessible in a browser. WITH trailing slash. Note that this is NOT a http path, but a server path. Examples:
/home/server/members/
c:\server\members/
If you are not sure of this, the following PHP code can be used to detect your server path.
<?php echo dirname(__file__).'/'; ?>
Type this into a blank .php file, upload and access in your browser. Then adjust the path accordingly to where your "members" folder is located.