C2 Backup

Extend data protection from your Synology NAS to the cloud

Complete your backup experience

Synology C2 Backup is a backup service on Synology Cloud² (Synology C2) for both enterprise and home users. With additional copies of your important files stored on Synology C2, data safety and availability can be ensured when a disaster happens.

One-stop service

With Synology NAS plus Synology C2 Backup, we offer a comprehensive solution, including service consulting, technical support, and RMA, guiding you through each step of your data protection journey.

Affordable cloud data protection

For any IT team, the lease of a data center together with other hardware investment and extra human resources can definitely be a financial burden. Saving a sufficient cost, C2 Backup offers you an affordable plan as well as comprehensive feature sets.

More than what you pay for

Enjoy download to any destination, file-level restoration, and multiple historical file versions without any additional cost.

Secure important data at military-grade level

You can safeguard your important data from illicit access while being transmitted or stored by enabling military-grade AES-256 and RSA-2048 encryption technologies.

Without the private key, which only you know, your important data stored on Synology C2 cannot be deciphered by anyone, not even by Synology.

Flexible backup plan

With the seamless integration of Hyper Backup, C2 Backup amplifies your backup experience.

Schedule backup tasks

Your backup tasks can run automatically at a scheduled point of time, or repeat on a desired schedule in order not to affect company's production.

Maintain file history

The advantage of multi-version support in Synology C2 Backup offers multiple recovery points of data.

Keep your data always available

In any case, your data is well protected on C2, allowing you to access important data from any platform with great flexibility, even without a Synology NAS.

Recover data in your way

Synology C2 Backup provides multiple methods of granular-level restoration for greater flexibility. For encrypted data, your data privacy can be ensured with the end-to-end encryption, as data will only be decrypted on the client side. 

  • On Windows or Mac 

    To retrieve your backup files, simply right-click the folder or file you need via Hyper Backup Explorer.
  • C2 web portal

    Log into C2 Backup portal with your Synology Account credentials to browse and download the right file intuitively.
  • On Windows or Mac 
  • C2 web portal
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Flexible Plans

Synology C2 Backup offers flexibility in plan selection in terms of features, storage size, and cost. Whether you are a new user who wants an easy-to-use cloud backup plan, or a system administrator in search for a secure cloud storage with optimized space utilization, Synology’s pricing plans can cover all your needs.

Plan I

100 GB

  • Daily backup
  • AES-256 data encryption
  • Restore from web browser
  • Free file versioning

€9.99 / year

300 GB

  • Daily backup
  • AES-256 data encryption
  • Restore from web browser
  • Free file versioning

€24.99 / year

1 TB

  • Daily backup
  • AES-256 data encryption
  • Restore from web browser
  • Free file versioning

€59.99 / year
(€5.99 / month)

Plan II
Starting from

1 TB

  • Hourly backup
  • AES-256 data encryption
  • Restore from web browser
  • Customizable retention policy
  • Deduplication

€69.99 / TB / year
(€6.99 / TB / month)

  • * The prices above do not include VAT. Local VAT needs to be added if applicable.
  • Plan I
    Plan I offers daily backup with regular retention to protect your data with 11 backup versions for the past 30 days. Regardless of the number of backup versions, only the source data size on your Synology NAS will be calculated into your storage usage on C2 cloud.
  • Plan II
    Plan II offers flexible backup schedules and customizable retention policies. Data size of all backup versions will be calculated into your storage usage on C2 cloud. However, the Plan II-exclusive deduplication can help you reduce duplicated data across different backup versions, thus optimizing the storage usage.
    You can upgrade from the original 1TB up to 99TB through in-app purchase. To purchase more than 99TB, please contact us.

No hidden fees

Besides the subscription cost, there are no hidden fees. Synology does not charge additional fees for file uploads, file restoration, or file browsing on the C2 console.

30-Day Free Trial

For each Synology Account, you can manually activate a one-time 30-day free trial. Try all great features before purchase.

Flexible Usage Plan

Backup storage on Synology C2 can be purchased using one Synology Account and shared with multiple Synology NAS servers associated with this account, increasing the flexibility of storage usage. Furthermore, you can always upgrade your backup plan during the subscription period if more space is needed.

How to Start a Backup Plan with Synology C2

Please log in to DSM as a system administrator and install the Hyper Backup package. Create a backup task and select Synology C2 as the cloud destination. You will be required to enter the Synology Account associated with the storage. Once you log in to the Synology C2 console, you can either begin the 30-day free trial, if this is a new Synology Account, or proceed to purchase a C2 Backup plan. For more information on creating backup plans with Synology C2, see our step-by-step tutorial.


  1. Synology C2 Backup requires Hyper Backup 2.1.2-604 or above.
  2. Synology does not guarantee package compatibility with DSM versions released after the release of Hyper Backup.
  3. Synology C2 Backup is not supported in China.

Frequently asked questions

Here we have listed some frequently asked questions about Synology C2 Backup. If you are unable to find the answers you are looking for, you are more than welcome to contact us via Synology Product Inquiry.


What do I need to use Synology C2 Backup?
You need a Synology Account and a physical Synology NAS server installed with DSM 6.0 (or above) and Hyper Backup 2.1.2 (or above).
How do I subscribe to C2 Backup?
Backup plans can be purchased through the subscription procedure via Hyper Backup with a valid credit card. Once you complete the subscription procedure, we will offer your account a 30-day free trial to allow you to evaluate whether the selected plan meets your backup needs.
Where is Synology C2 data center located?
Synology C2 data center is located in Frankfurt, Germany. New data centers are currently under construction. All data stored on Synology C2 will remain only in the data center to which they were originally uploaded.


Can I back up files from my desktop/laptop computer?
No, data can only be backed up from Synology NAS servers via Hyper Backup.
Can I back up files from multiple Synology NAS servers to C2 Backup?
Yes, data stored on multiple Synology NAS servers can be backed up to the same C2 Backup account's storage space.
How long does it take for the first-time backup?
Backup speed is determined by Internet bandwidth, network traffic, the amount of files to be backed up, and other factors. Therefore, a specific speed for backing up files to C2 Backup cannot be guaranteed. In general, with a 20 Mbps upload speed, it may take about 3 days to transfer 500 GB data.
How do I relink my previously created C2 Backup tasks on a newly installed DSM or a new Synology NAS?
You may refer to this FAQ for the instruction on how to relink a previously created C2 Backup task.
Is there file size limit for a single file to be backed up?
No, there is no file size limit for a single file to be backed up.
If I want to import or export over 10TB of data to and from C2, is there any way to speed up the initial data transfer?
Synology C2 offers an extra physical transfer service to speed up data transfer to and from C2 data center. Extra service fees may apply. Please contact us if your data size exceeds 10TB.


How do I pay for my Synology C2 Backup subscriptions?
The current available payment method is Credit Card. Synology C2 accepts Visa, MasterCard, and American Express. For EU countries, SEPA Direct Debit is also available.
What will happen to my C2 Backup service if my subscription expires?
Your subscription will be automatically renewed according to your previous subscription plan, and Synology will automatically re-bill your credit card depending on the plan to which you subscribed. If you disable automatic subscription renewal in the C2 console before the expiry date, your subscription will expire and you will not be rebilled when the current subscription ends. On the seventh day after expiration, your Synology NAS will stop backing up data to C2, and your backed-up data will be deleted after continued non-payment.
How do I cancel my subscription? 
To cancel your subscription, you can turn off auto renewal before the subscription expiry date or 30-day free trial. Visit this FAQ page for step-by-step instructions.
Can I upgrade my plan anytime if more space is needed?
Yes, you can upgrade your backup plan whenever more space is needed, anytime during your subscription period. Plan upgrade is flexible, as you can upgrade your plan right away or schedule an upgrade to take effect at the start of the next subscription period.
How can I terminate my C2 service?
You can terminate your service through the Synology C2 portal. Learn more.

Privacy & Security

How secure is my data?
Synology C2 data centers identify all the incoming data with your Synology Account. Only you can access the data in every operation you need to perform. By enabling the client side encryption through Hyper Backup, your data is encrypted with government-approved AES-256 strong encryption before it is sent to Synology C2 data centers. Your NAS and Synology C2 are communicating through secure channels with SSL encryption. The two-step authentication can be enabled to enhance the level of security when logging into your Synology C2.
How do Synology C2 data centers defend against physical security threats?
Synology C2 data centers are highly secure. Physical security is ensured via high fences, 24/7 security personnel, and video surveillance with 90-day archiving. Biometric hand-geometry scan and proximity key card are required for access.
Why can data be safe in Synology C2 data centers?
The highly available and redundant infrastructure is designed to minimize associated risks and eliminate single points of failure. Synology C2 adopts the high level approach of need plus three (N+3) for data stored on Synology C2 to have greater redundancy. This ensures that if there is a failure in a hardware-layer component, it does not affect Synology C2 customers. Electrical power systems of the data centers are designed to provide uninterrupted power supply to the entire infrastructure 24/7.
Does Synology C2 offer a data processing agreement (DPA)?
Yes, Synology C2 offers a GDPR-compliant DPA that allows you to comply with GDPR contractual obligations. The Synology C2 GDPR DPA is incorporated into the Synology C2 Terms & Conditions and applies automatically to all customers around the globe who require GDPR compliance.
What third-party compliance requirements does Synology C2 meet?
Synology C2 uses ISO 27001 certified datacenter facilities for colocating our equipment, and meets PCI DSS compliance by processing and storing your billing information with the PCI Level 1 Service Provider.