Leave blank for AWS S3. For S3-compatible providers (MinIO, DigitalOcean Spaces, Cloudflare R2, Backblaze, OVH), set the endpoint URL and enter the region your provider expects — e.g. auto for R2, nyc3 for DigitalOcean, or us-east-1 for MinIO.
This will disconnect your S3 bucket. Data already stored will remain in your bucket.