Earlier quoted context omitted.
How do I find a UL-security-rated safe? Does it matter if I don't bolt it to the floor?
Depends on where you are. UL ratings are used in north america. There are similar EU ratings that I dont recall of hand. TL ratings are for theft/entry resistance. There are other modifiers for fire, water, chemical, etc resistance. Unrated "safes", and even some that are said to be rated, are junk. In NA you want to get in touch with a local safe dealer/specialist. Most of their business is commercial, and they are…
For anyone who wants a good safe cracking story, this book is excellent: https://www.amazon.com/Flawless-Inside-Largest-Diamond-Histo...
A group of Italians went to Belgium's diamond district and bypassed an very expensive vault door. The best part was using an aerosol can of hair spray attached to a broom to defeat the top of the line motion sensors.
Edit: Can anyone explain why it's a 30 minute test for UL 30x6?