Log in to your control panel.
Select the domain name that you want to apply the change to.
Click on DIRECTORIES.
Click on ADD.
Next to "Protected Directory", enter the name of the directory that you want to create including the path to the directory.
Select either non-SSL or SSL. Non-SSL directories will be created in the httpdocs directory and SSL directories will be created in the httpsdocs directory.
Enter the "Header Text" if any. This is the text that will be displayed on the dialog box that comes up when someone tries to access the protected directory.
Click on UPDATE.
Select directory that you have just created.
Enter the username that you want to create for this protected directory.
Click on ADD.
Enter the new password and confirm the new password.
Click on UPDATE.
Repeat for any additional users (if any).
Upload your the files that you want to protect to the protected directory that you have just created. For non-SSL protected directories, upload your files to your httpdocsdirectoryr. For SSL protected directories, upload your files to your httpsdocs directory.