IMHO backing up is something everyone should do - it's the what, when and how that cause the most grief. I prefer to use Dantz Retrospect (the OSX beta is still quirky) and others prefer to do the file-by-file technique. The device and media you use will be best determined by the amount of value you place on your data and the depth of your pockets. As you are looking to backup 30GB I will assume that the 30GB of data will not have changed more than 50% for backup #2. And that for backup #3 you would need to backup less than 10GB of new data.
If this is the case I would reccomend going with CD. Yeah, I know, it's a pain the first time around, but it only gets easier as time progresses.
If the above is not true and you are backing up new 30GB data sets or just prefer to not increment your backups then, by all means go with tape. The media will cost you more than CDR media, but then again we're talking about your data right?!
Just a thought,
Q
p.s. you may wanna check out
APS Tech for a starter.
[ 03-24-2002: Message edited by: Qhris ]