Is there a guide available for this product? I'm trying it out and it seems to be very good, but I'm not that familiar with concepts like RAM disks and so on.
Yes, there is an online guide referred to as Help Documents". On the linked page below, you will find all the necessary information related to how the program works and how you can work with the software to create backups and restore something in case of emergency. The RAMDISk is like a virtual drive that acts like a dedicated RAM chip to help your system load more applications.
Use the following link to reach the desired page: http://www.idiskhome.com/help/index.shtml