I have every inspection I have ever done (since 1989). Up until a few years ago, they were in paper format, so there are several file boxes per year.
Since I moved to electronic reporting, I save reports on hard drive, back up to monthly c/d's, then back up quarterly, then again at the end of the year. I also back up to an external hard drive.

I have not taken the time or trouble to also put a back up off site, so if my house burns down - it's all gone. But then, that's the story of just about anything for a business that was involved with Katrina, or the World Trade Center. Sorry, it's just gone. I think that even if I had back ups at the bank safe deposit box during Katrina, they still would have been lost (if I was there).

I just can't bring myself to destroy the old stuff. I probably will this spring when I get down to the basement and start changing stuff around. I have way too many file boxes stacked up.

As far as legal work goes - I keep everything involved with my work in a separate folder with everything I used to prepare my report. For example, if I refer to the Simpson catalog, I keep a copy of the pages used. I keep a c/d of the photos used, etc. I also keep a record of telephone data, etc. A lot of it is NOT electronic with the EW work.

JF