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一篇博客文章，详细介绍了一种"最后手段备份"策略：将装在密封盒中的 Blu-ray M-Disc 存放在可信赖的朋友处，涵盖要保存哪些数据、硬件选择，以及用于长期灾难恢复的轮换流程。
M-DISC is a write-once optical disc technology introduced in 2009 by Millenniata, designed for archival storage with claims of up to 1000 years of longevity. The discs use a glassy carbon data layer and are compatible with standard DVD and Blu-ray formats.