ask him to make an ftp account for you on his server
then from the backup in the WHM setup backup to ftp server
set the host + username + password for the ftp.
and set it on daily, weekly or monthly
then every day around 6 am on the server time it will start doing the back up.
now the good thing will be if your friend will creat a subdomain for you as a full domain that will make his server take a second backup on his second hard drive.
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