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IIRC, "M-Disc" branded discs stopped being "M-Disc"-spec at some point, but since it's quite a niche product that peaked (over?) a decade ago, it's hard to find any definitive information about this in 2026. It's a shame because I liked the format. I'd be glad to see any form of confirmation or correction.

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If you’re talking about this post, it’s just someone who was misinformed. https://www.reddit.com/r/DataHoarder/s/cmxnECtgAv

> Verbatim clarified that these discs were advancements. The technical changes resulted in a different appearance and the ability for higher burning speeds, the changed media-ID was due to an adaptation with regard to other Verbatim products. Verbatim had already shipped the first modified media in early 2022. The data security of the new discs is not inferior to that of the old discs: Data should also last 1000 years, according to the manufacturer.

From what I understand the BDXL discs are made in the exact same way as M-Discs and should have the same longevity.

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