How can I backup onto several CD-RWs?

There is an application called Genie Backup Manager which will span CDs and has compression both of which will help you.

To backup directly to CD you need some other software which can do what is called "packet writing". This is a technique which allows CDs to work exactly like floppies do. Roxio have a utility called Drag-To-Disk.

Brian Jones
August 2003