https://blog.margrop.net/en/tag/%E5%A4%87%E4%BB%BD/ Recent content in 备份 on Margrop Blog Hugo -- gohugo.io en-US Wed, 29 Jul 2026 08:00:00 +0800 https://blog.margrop.net/en/post/photo-backup-3-2-1-rule-%E7%85%A7%E7%89%87%E5%A4%87%E4%BB%BD/ Wed, 29 Jul 2026 08:00:00 +0800 https://blog.margrop.net/en/post/photo-backup-3-2-1-rule-%E7%85%A7%E7%89%87%E5%A4%87%E4%BB%BD/ <blockquote> <p><strong>The short answer</strong></p> <p>If your photos exist only on a phone, a computer, and one NAS, you may not have three backups. You may have three doors leading to the same room. A lost phone, ransomware on the NAS, an accidental synchronized deletion, or a house fire can remove all three doors at once.</p> <p>The rule worth remembering is <strong>3-2-1: at least 3 copies, on at least 2 types of media, with at least 1 copy offsite</strong>. The stronger version is 3-2-1-1-0: add 1 offline or immutable copy, and verify that recovery has 0 undetected errors.</p> </blockquote>