Hello.

I believe that the best solution would be to use new module - Site backup scheduled task, which already can do all what you would need to programme yourself. This module will be placed on our Marketplace soon, but I can send it to you sooner. I don´t know you email address, so if you want, please send us an email to support@kentico.com and refer to this forum post. Thank you.

Best Regards,
Radek Macalik