Connecting to an S3 compatible bucket

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Hi everyone,

I’m trying to connect Databricks to an S3-compatible bucket using a custom endpoint URL and access keys.
I’m using an Express account with Serverless SQL Warehouses, but the only external storage options I see are AWS IAM roles or Cloudflare R2.
Is there any supported way to connect to a generic S3-compatible object store (via access key/secret + endpoint)? What is the workaround?