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Connecting Synology C2 Object Storage

This guide walks you through connecting a Synology C2 Object Storage destination to Pluton.

Prerequisites​

Before connecting Synology C2, you need:

  1. A Synology C2 Object Storage account - Sign up here
  2. An Access Key ID and Secret Access Key for API access

Getting Your Credentials​

Step 1: Create a Synology C2 Account​

  1. Go to the Synology C2 Object Storage page
  2. Sign in with your Synology Account or create a new one
  3. Subscribe to the C2 Object Storage plan that fits your needs

Step 2: Generate API Credentials​

  1. Log into the C2 Object Storage Console
  2. Navigate to your account or credentials settings
  3. Create a new set of Access Key ID and Secret Access Key
  4. Important: Copy both credentials immediately — the Secret Access Key may only be shown once

Step 3: Note Your Region​

Synology C2 uses region-based endpoints. Identify which region your storage is provisioned in:

  • EU Endpoint 1 (eu-001)
  • EU Endpoint 2 (eu-002)
  • EU Endpoint 3 (eu-003)
  • EU Endpoint 4 (eu-004)
  • US Endpoint 1 (us-001)
  • US Endpoint 2 (us-002)
  • US Endpoint 3 (us-003)
  • TW Endpoint 1 (tw-001)

Connecting to Pluton​

Pluton Synology C2

Step 1: Add Storage​

  1. In Pluton, navigate to Storages
  2. Click Add Storage button
  3. Select Synology C2 from the provider list

Step 2: Configure Connection​

Fill in the required fields:

  • Storage Name: A friendly name (e.g., "Synology C2 Backups")
  • Access Key ID: Your Synology C2 Access Key ID
  • Secret Access Key: Your Synology C2 Secret Access Key (password)
  • Region: Select the region matching your C2 storage. The region determines the API endpoint used for connections. Available options include:
    • EU Endpoint 1 (eu-001)
    • EU Endpoint 2 (eu-002)
    • EU Endpoint 3 (eu-003)
    • EU Endpoint 4 (eu-004)
    • US Endpoint 1 (us-001)
    • US Endpoint 2 (us-002)
    • US Endpoint 3 (us-003)
    • TW Endpoint 1 (tw-001)
    • Or insert a custom region value

Step 3: Advanced Options (Optional)​

Additional settings available:

  • Server-side Encryption: Choose AES256 or KMS encryption for data at rest
  • Storage Class: Select the storage class for new objects
  • Bucket ACL: Set access control for bucket creation (private, public-read, etc.)
  • Upload Cutoff: Threshold for switching to chunked uploads (default: 200 MiB)
  • Chunk Size: Size of chunks for multipart uploads (default: 5 MiB)
  • Force Path Style: Enabled by default; use path-style access for S3 requests
  • Disable Checksum: Skip MD5 checksum storage for faster uploads

Step 4: Test and Save​

  1. Click Test Connection to verify credentials
  2. If successful, click Save
  3. Your Synology C2 storage is now ready for backup plans

Common Issues​

Authentication Failed: Double-check your Access Key ID and Secret Access Key. Ensure the credentials have not been revoked in the C2 console.

Region Mismatch: Make sure the selected region matches the region where your C2 storage was provisioned. Using the wrong region will result in connection errors.

Bucket Not Found: Verify the bucket exists in your Synology C2 console and that your credentials have permission to access it.

Best Practices​

  • Generate dedicated API credentials specifically for Pluton backups
  • Select the region closest to your Pluton server for optimal transfer speeds
  • Enable server-side encryption for sensitive data
  • Monitor your Synology C2 storage usage from the C2 console to manage costs
  • Use separate buckets for different backup plans for easier organization