I'm trying to get a handle on this, maybe some gurus here can help. I have 2 new computers, XP pro on both. Running just file and device sharing. The "server" has 160 GB Raid drives ( "0" I think ). I'm expecting to run "9.0 home" on both computers. I,ve been planning on storing "full and diff." backups on "opposing" computers. The data is very critical ( by the day, not "the minute" ). I'm looking for some best practices, as to "secure backup". The opposing images would seem to serve the system fairly well as far as system, or software corruption, and even drive failures if carried out properly, but this doesn't cover "fire" etc., so I need offsite backup as well. A few questions: > Can offsite backup be handled with DVD full backups, plus rotating DVD Diff. backups ? Is this safe ( workable ) ? > how about external hard drive(s) ? again, safe ( workable) I've read a great deal on "fozzy's" USB external drive dillema. > what is the meaningfulness of the raid drives, If I backup to "opposing" networked computers, and also keep offsite backups on DVD, or external drives ? Thanks for any insights you can offer, > Barry ooPS: I'm quite the reader, any links to this kind of discussion ?