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PostSider supports the bundled MinIO service, local filesystem storage, and optional Cloudflare R2 object storage. The bundled OSS Compose stack explicitly sets MinIO; local storage is a generic application fallback, not the Compose default.

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MinIO: Compose default

The Compose stack stores media in the minio-data Docker volume and creates the MINIO_BUCKET bucket during startup.
Your reverse proxy must expose media at /storage/ and proxy that path to 127.0.0.1:9000/<MINIO_BUCKET>/. Keep the MinIO console private. The bundled initialization policy allows anonymous GetObject access for social platforms, but does not allow bucket listing or uploads. Anyone who obtains a media URL can read that object.
Back up the minio-data volume or copy the bucket with an S3-compatible backup tool. A PostgreSQL dump does not include uploaded media.

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Local filesystem

Local storage is useful for development or a custom non-Compose deployment:
Back up the uploads/ directory together with PostgreSQL.

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Cloudflare R2

For a separately managed S3-compatible bucket, use Cloudflare R2:
Configure public object access or a public custom domain so social platforms can fetch media URLs. Existing files are not migrated automatically when you change providers.

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Backup checklist

Back up media together with both PostgreSQL databases and the .env file. ENCRYPTION_KEY is required to decrypt stored provider credentials. Test restoring a media object, the application database, and Temporal’s database before relying on the backup.