If you’re that concerned about security, I suggest you back up your data. Optical is best, but that seems to be going away, so external drive might be your choice.
Back in the day when I was responsible for my clients’ data, I kept two identical encrypted external hard drives (today you could use SSD). One was connected to my computer and automatically mirrored the data, and the other one was kept in my brother-in-law’s gun safe in the next city over. I swapped them out once a week. That secured the data in case of theft, water leak, or natural disaster.
Correction:
fire, theft, water leak, or natural disaster