Using the file manager, you can restrict access to certain site directories using an arbitrary username and password. After setting the restrictions when visiting these directories in the browser, visitors will need to enter a username and password.
To password-protect the directory on the site, do the following:
Highlight the directory you want to close with a password, right-click on it and select "
Set password»:

Enter the desired username and password, confirm the operation:

Wait 10-15 minutes for the changes to take effect.
To disable password protection for a directory on a site, do the following:
Highlight the directory for which the password was set, right-click on it and select "
Remove password»:

Confirm the operation.
Wait 10-15 minutes for the changes to take effect.