Video of ceramic storage system prototype surfaces online — 10,000TB cartridges bombarded with laser rays could become mainstream by 2030, making slow hard drives and tapes obsolete::Ceramics-based storage medium consumes very little energy and lasts more than 5,000 years, creators say
Having backups at multiple sites is industry standard. Nobody is keeping 100,000TB of data in a single location.
As for your second point, I don’t see the relevance. You can store the glass wherever you want, the other mechanisms aren’t relevant for keeping the stored data.