Did you backup today? If it helps to have ideas: I have a centralized in-house backup server using a program called Borg. All of my machines do backups to it over the network. I periodically dump those backups to tape (LTO), which get stored in an UL Class 125 rated fire-resistant safe. The safe interior's rated to remain below 125°F (51°C) when subjected to temperatures up to 2,000°F (1093°C) for a duration of 3 hours. This seemed long enough to allow for a response from the fire department.