File Manager

Hi, this is my first post. I’m starting to use wordpress and i found i little trouble.
I downloaded and activated wp-FileManager plugin but it doesn’t accept the path of “Filemanager Default Home location”. I wrote “/wp-content/uploads/ ” but it doesn’t like it: “Invalid home folder.”. I tried also with absolute path but it’s still wrong. I found that must be edit “config.inc.php” the variable $home_directory but i’d like someone tell what must write and where because there are two lines with this variable. I didn’t find the explanation about it online. Could you help me please?

Thank you