I moved the 3 folders as described in the documentation (https://docs.whmcs.com/Further_Security_Steps) under "/home/username/" and added the following lines in configuration.php :
$attachments_dir = "/home/username/attachments/";
$downloads_dir = "/home/username/downloads/";
$templates_compiledir = "/home/username/templates_c/";
Folders permissions are correct and templates_c folder work fine. downloads and attachments not, when i run "System Health Status", I get the warning below.
I don't understand Why.
Thank's for your help, Lele