Worked for a company in 1998 that had all the employee data on an excel spreadsheet: everything from emergency contacts to date of last paycheck. All of HR. And “for security” it was stored on a floppy disk. One single disk. Which was put back in the safe every close of business. One day, the disk got corrupted. The “backup” was an end-of-year printout, but any changes since then were gone.