Comment by lxgr

> https://en.wikipedia.org/wiki/5D_optical_data_storage

An interesting technology, but also not exactly something I could get at my local Best Buy today.

M-DISC, assuming it's writable using consumer Blu-Ray writers, is promising though – Blu-Ray drives can probably still considered ubiquitous enough in a pinch.

> DNA storage

DNA is in fact extremely unstable unless it's part of living organisms that constantly error-correct and replicate it, and even then you have random mutations.