Shoot with dual cards if your camera allows it. If not, copy files to two drives before you format anything.
Name folders by date and event immediately. “Final_FINAL_2” folders are how photos get lost.
Keep at least one backup offline or off-site. A single drive in the same bag as the camera fails the same day the bag is stolen.
Test a restore once a year. Backups you have never restored are hopes, not plans.
