n8n-docs-v2 / docs /hosting /configuration /environment-variables /external-data-storage.md

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title: External data storage environment variables
description: >-
  Environment variables to configure external data storage for your self-hosted
  n8n instance.
contentType: reference
tags:
  - environment variables
  - external storage
  - storage
hide:
  - toc
  - tags

External data storage environment variables

--8<-- "_snippets/self-hosting/file-based-configuration.md"

Refer to External storage for more information on using external storage for binary data.

Variable	Type	Default	Description
`N8N_EXTERNAL_STORAGE_S3_HOST`	String	-	Host of the n8n bucket in S3-compatible external storage. For example, `s3.us-east-1.amazonaws.com`
`N8N_EXTERNAL_STORAGE_S3_BUCKET_NAME`	String	-	Name of the n8n bucket in S3-compatible external storage.
`N8N_EXTERNAL_STORAGE_S3_BUCKET_REGION`	String	-	Region of the n8n bucket in S3-compatible external storage. For example, `us-east-1`
`N8N_EXTERNAL_STORAGE_S3_ACCESS_KEY`	String	-	Access key in S3-compatible external storage
`N8N_EXTERNAL_STORAGE_S3_ACCESS_SECRET`	String	-	Access secret in S3-compatible external storage.
`N8N_EXTERNAL_STORAGE_S3_AUTH_AUTO_DETECT`	Boolean	-	Use automatic credential detection to authenticate S3 calls for external storage. This will ignore the access key and access secret and use the default credential provider chain.