I have a picture, somewhere, taken in the 1990's, of a PC from a UK school. The staff, to their credit, had reliably made backups on a daily/weekly basis to floppy discs. Their mistake was to store them all in a box on top of the PC. One day the PC caught fire. The picture shows the remains of the PC and the melted backups dripping down the frame.

Make sure you store your backups somewhere safe !!