> For the complete documentation index, see [llms.txt](https://docs.wellcomecollection.org/storage-service/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wellcomecollection.org/storage-service/wellcome-specific-information/our-storage-configuration.md).

# Our storage configuration

- [Our three replicas: S3, Glacier, and Azure](https://docs.wellcomecollection.org/storage-service/wellcome-specific-information/our-storage-configuration/replica-configuration.md)
- [Using multiple storage tiers for cost-efficiency (A/V, TIFFs)](https://docs.wellcomecollection.org/storage-service/wellcome-specific-information/our-storage-configuration/using-multiple-storage-tiers-for-cost-efficiency-a-v-tiffs.md)
- [Small fluctuations in our storage bill](https://docs.wellcomecollection.org/storage-service/wellcome-specific-information/our-storage-configuration/small-fluctuations-in-our-storage-bill.md)
- [Delete protection on the production storage service](https://docs.wellcomecollection.org/storage-service/wellcome-specific-information/our-storage-configuration/delete-protection-on-the-production-storage-service.md)