Backup strategy before disk failure
Monitoring tells you when risk rises; backups prove you can recover.
Versioned copies beat nightly overwrites
Ransomware and silent corruption punish single-layer schedules — retain incremental history per vendor guidance.
Offline or air-gapped rotation
Rotate cold disks monthly for irreplaceable archives — cloud sync alone is not offline immunity.
Quarterly restore drills
Pick random files + one VM/database snapshot — restore to scratch hardware. Log timings and gaps.