# Error uploading backup to B2

**URL:** <https://meta.discourse.org/t/error-uploading-backup-to-b2/393682>\
**Category:** Support\
**Tags:** backups, s3\
**Created:** [January 16, 2026, 3:25pm UTC](https://meta.discourse.org/t/error-uploading-backup-to-b2/393682 "2026-01-16T15:25:50Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![bondero](https://avatars.discourse-cdn.com/v4/letter/b/b4bc9f/32.png) [@bondero](https://meta.discourse.org/u/bondero)\
**Post date:** [March 4, 2026, 3:01am UTC](https://meta.discourse.org/t/error-uploading-backup-to-b2/393682/9 "2026-03-04T03:01:58Z")

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Yeah, my setup doesn’t have the `AWS_*_CHECKSUM_CALCULATION` configs, which is where your setup seems to be erroring. There’s a thread on [that feature not being supported by B2](https://meta.discourse.org/t/cant-rebuild-due-to-aws-sdk-gem-bump-and-new-aws-data-integrity-protections/354217/52), seems they recently implemented it, but I’m not sure if it actually works.

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