docs/concepts/bindings/specs/s3.md

AWS S3 Binding Spec

apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: <name>
spec:
  type: bindings.aws.s3
  metadata:
  - name: region
    value: us-west-2
  - name: accessKey
    value: *****************
  - name: secretKey
    value: *****************
  - name: bucket
    value: mybucket

region is the AWS region. accessKey is the AWS access key. secretKey is the AWS secret key. table is the name of the S3 bucket to write to.