Well... it's a little complicated. Used to be that I could backup my personal data on a big old satellite in space. If I got blown up, my most recent instance of data would just get uploaded into a new body, and I'd only lose the memories that happened in the interim. It isn't ideal, but its better than going kaput entirely.

[ 9S is probably worse about self-preservation than most other androids, but it's also part of what makes him a good support unit. ]

Still, I probably have a pretty different outlook on those kinds of injuries than you humans do... unless you figured out a way to regrow limbs and such?