Complete your backup setup

Synology C2 Backup is a cloud backup solution for enterprise and home users. Storing backups of your files to Synology C2 ensures that essential data remain safe and available even if local copies are hit by disaster or IT failure.

One-stop solution

Synology NAS and C2 Backup combine to offer a comprehensive data protection solution. From service consulting and technical support to hardware warranty, Synology is with you each step of your data protection journey.

Affordable cloud data protection

Unpredictable data center costs, as well as hardware and administration expenses make privately setting up secure remote backup storage a daunting task. C2 Backup plans offer full-featured professional data protection at a predictably low price.

More than what you pay for

Restore full backups, individual files, and multiple historical versions to any destination, with a web portal, desktop client, and Synology NAS integration.

Secure data with military-grade encryption

Enable client-side encryption and make your data unreadable before it leaves your device with advanced AES-256 and RSA-2048 encryption.

A password-protected private key for each task ensures that neither Synology, nor any other person or organization can decrypt, access, or modify your data.

Flexible backup options

Seamlessly integrated with Hyper Backup on your Synology NAS, C2 Backup adds protection and functionality to your existing backup configuration.

Schedule backup tasks

Run backup tasks at scheduled times and plan transmissions outside peak business hours.

Explore file histories

Multi-version support means C2 Backup users have access to multiple recovery points for each file.

Access data from anywhere

Access your essential data when no Synology NAS is at hand. Download individual files to your PC using Hyper Backup Explorer or the Synology C2 web portal.

Recover data your way

C2 Backup offers multiple granular restoration options for greater flexibility. Enable advanced encryption to ensure that only you can read your data and protect the integrity of your backups.

  • Windows, Mac, and Linux

    Windows, Mac, and Linux

    Hyper Backup Explorer client available for all major operating systems lets you retrieve files with a simple click.

  • C2 Backup web portal

    C2 Backup web portal

    Sign in to the Synology C2 Backup portal with your Synology Account to browse and download any file through a streamlined interface.

Flexible Plans

Synology C2 Backup plans are tailored to different users with features, storage and prices to match their size and needs. Whether you are a home user looking for an easy-to-use cloud backup plan, or a system administrator in search of secure cloud storage with optimized space utilization, Synology’s pricing plans can meet your needs.

  • * The prices above do not include VAT. Local VAT is added if applicable.
  • Plan I
    Plan I protects your data through daily backups with a default retention policy. C2 Backup will retain 11 backup versions (one latest, 7 daily, 3 weekly) going back 30 days. Regardless of the cumulative size of your backup versions, only the source data size on your Synology NAS is counted toward your C2 Backup storage usage.
  • Plan II
    Plan II lets you customize your backup schedules and retention policies. All your backup versions count toward your total C2 Backup storage usage. However, Plan II-exclusive deduplication helps you cut back storage use by reducing duplicate data across different versions.
    Extra storage space up to 200 TB can be added directly through in-app purchase. To purchase more than 200 TB, please contact us.

No hidden fees

Synology charges no hidden fees besides the subscription cost. File upload, restoration, and browsing are always free of charge on your Synology NAS, through the PC client, and using the C2 web portal.

30-Day Free Trial

Each Synology Account can activate a one-time 30-day free trial. Try all the great features that C2 Backup offers before deciding whether Synology C2 is the solution for you.

Flexible Usage Plan

Backup storage on Synology C2 can be purchased using one Synology Account and shared with multiple Synology NAS, increasing the flexibility of storage use. You can upgrade your backup plan at any time if more space is needed.

How to Start a Backup Plan with Synology C2

Sign in to DSM with administrator privileges and install Synology Hyper Backup. Create a backup task and select Synology C2 as the cloud destination. You will be asked to sign in with the Synology Account you wish to use to manage C2 Backup. After login, you may start the 30-day free trial if eligible or 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 version 2.2.4-1213 or above.
  2. Synology does not guarantee compatibiliy with DSM or Synology C2 for older versions of Hyper Backup
  3. Synology C2 Backup is not supported in China.

Frequently asked questions

We have listed some frequently asked questions about Synology C2 Backup. If you cannot find your answer on this page, you may also contact us via Synology Product Inquiry.


What do I need to use Synology C2 Backup?
To use Synology C2 for backup, you need a Synology Account, a physical Synology NAS server with DSM 6.0 (or above) and Hyper Backup 2.1.2 (or above).
How do I subscribe to C2 Backup?
Synology C2 Backup plans can be purchased in Hyper Backup on your Synology NAS. All new users are offered a 30-day free trial subscription. Users are free to cancel their subscription at any time during their trial period. Synology C2 accepts Visa, MasterCard, and American Express. SEPA Direct Debit payment is available in participating countries.
Where does Synology C2 have data centers?
Synology C2 currently operates data centers in the US and Germany. Users are asked to select a data center location when they sign up for a C2 Backup plan. All data stored on Synology C2 are kept exclusively in the country and data center to which they were originally uploaded.


Can I back up my files directly from my desktop/laptop computer?
No, only data stored on a Synology NAS can be backed up directly to Synology C2 using Hyper Backup. However, you can back up your devices to Synology NAS using any Synology backup solution. Hyper Backup can then be used to store an offsite copy of files on your Synology NAS to Synology C2 Backup.
Can I back up files from multiple Synology NAS to C2 Backup?
Yes, data stored on multiple Synology NAS can be backed up using the same Synology Account.
How long does the first full backup take?
The speed of your initial backup depends on your internet bandwidth, network traffic, and the number and size of the files to be backed up. Synology therefore cannot predict with certainty how long your first backup will take. At an upload speed of 20 Mbps, it might take 3 days to transfer about 500 GB of data.
How do I relink my previously created C2 Backup tasks to a newly installed DSM or a new Synology NAS?
Refer to this FAQ for step-by-step instruction on how to reconnect a previously created C2 Backup task to a newly installed DSM instance or Synology NAS.
Is there a size limit for individual files in C2 Backup?
No, Synology C2 Backup has no maximum size for single files.
If I want to import or export more than 10TB of data to or from C2, is there any way to speed up the initial data transfer?
Yes, Synology C2 Express Box is a physical transfer service that helps users get data to and from C2 data centers faster. Additional service charges apply. Please refer to the Synology C2 Express Box User's Guide for details, instructions, and pricing. To order Synology C2 Express Box service, please contact us through this form.
Can I migrate data stored on C2 Backup between Synology's German and US data centers?
No, it is not possible to automatically migrate your data on Synology C2 Backup between Synology's US and German data centers.

Users are asked to select a data center location when they sign up for a C2 Backup plan. Synology guarantees that data are only kept on servers in the country selected.

If you wish to keep your backup data in a different location, please create a new Synology C2 Backup plan, select the desired location, and upload your data from Synology NAS to the data center of your preference.


How can I pay for my Synology C2 Backup subscription?
Synology C2 accepts payment with Visa, MasterCard, and American Express credit cards. SEPA Direct Debit payment is available in participating countries.
What will happen to my C2 Backup service if my subscription expires?
Your current subscription is automatically renewed at the end of each subscription period, unless you disable automatic renewal before the end of the subscription period. Synology bills your credit card or bank account monthly or yearly. If you disable renewal or do not pay, your Synology NAS will stop backing up to C2 Backup on the seventh day after expiration. Synology will start removing data within 30 days after expiration.
How can I cancel my subscription? 
Your current subscription is automatically renewed at the end of each subscription period. To cancel your plan, disable automatic subscription renewal in the Synology C2 portal before the end of the subscription period. Your Synology NAS will stop backing up to C2 Backup on the seventh day after expiration. Synology will start removing data within 30 days after expiration. Refer to this page for step-by-step instructions.

Please note that your plan will remain active for the remainder of the current subscription period and no refunds are provided.
Please note that your plan will remain active for the remainder of the current subscription period and no refunds are provided.
Can I upgrade my plan anytime if I need more space?
Yes, you can upgrade your backup plan at any time during your subscription period. You can choose to change your plan with immediate effect, or have the upgrade take effect at the start of the next subscription period.

If you upgrade your monthly plan with immediate effect, the additional costs will be calculated per day and added to your next monthly invoice. If you upgrade your annual subscription with immediate effect, you will receive an additional invoice and be billed for the number of days that remain until the end of the subscription period.
How can I terminate my C2 service?
You can terminate your service with immediate effect in the Synology C2 portal. Your Synology services will stop and disconnect from your Synology NAS. Synology will start removing data within 30 days after expiration. Refer to this page for step-by-step instructions.

Please note that no refunds are provided for the remainder of the current subscription period.

Privacy & Security

How is my data protected against unauthorized access?
Data in Synology C2 data centers can only be accessed by the Synology Account that originally uploaded them. Your Synology NAS communicates with C2 over a securely encrypted SSL connection.

Our servers protect all data from unauthorized breach with encryption-at-rest. Data are rendered unreadable before they are stored to any drive, with decryption keys kept on another system.

Additionally, we strongly recommend that users enable client-side encryption in Hyper Backup. If you enable client-side encryption, your data are rendered unreadable using the advanced AES-256 encryption standard before transmission to Synology C2.

For an additional layer of security, you can enable 2-step verification. Enabling 2-step verification ensures that your data can only be accessed with a code provided by an authenticator app on your mobile phone.
Is my data in C2 data centers protected against physical security threats?
Synology data centers have passed rigorous inspections for strict security procedures and physical safety features, and meet Synology's high standards for incident response and access restrictions.

Synology monitors employee access to its storage locations. All data on our servers is protected against breach or physical theft with encryption-at-rest.
How does Synology C2 protect against data loss and corruption?
Synology C2 uses highly available and redundant infrastructure designed to eliminate single points of failure and ensure uninterrupted power supply year-round. Meanwhile, we protect against hardware failure by applying erasure coding to all data stored on our servers.

Similar to a RAID setup, our erasure coding stripes data into many pieces, with a redundancy of three pieces (meaning three servers can crash and your data will still be available). However, with erasure coding, users do not need to wait for recovery (which is instant). Erasure coding also helps detect and repair corrupted data.
Does Synology C2 offer a data processing agreement (DPA)?
Yes, Synology C2 offers a GDPR-compliant DPA that allows users to comply with contractual obligations as set out in the EU General Data Protection Regulation. The Synology C2 GDPR DPA is incorporated into the Synology C2 Terms & Conditions and applies automatically to all customers worldwide who require GDPR compliance.
What third-party compliance requirements does Synology C2 meet?
Synology C2 Backup’s German colocation data center facilities are certified up to the ISO 27001 standard, one of the strictest available security frameworks for information technology.

Synology C2 Backup's US colocation data center facilities have achieved comprehensive SOC 2 Type II certification, confirming it has strict procedures in place to keep user data secure.

Synology handles your payment details in compliance with PCI DSS by processing and storing your billing information with a PCI Level 1 Service Provider.
Does Synology C2 support user compliance with HIPAA?
The US Department of Health and Human Services (HHS) does not officially issue or recognize any form of HIPAA compliance certification. Complying with HIPAA is therefore a shared responsibility between the user and Synology C2.

The Health Insurance Portability and Accountability Act (HIPAA) of 1996 introduced regulatory standards for the lawful use and disclosure of protected health information (PHI). The legislation demands that any company working with PHI comply with the Security Rule and the Privacy Rule set by HHS.

Synology C2 allows users to comply with HIPAA standards. Synology C2 services are built under the supervision of our Product Security Incident Response Team (PSIRT) engineers.

All PHI transferred to and stored on Synology C2 is protected by encryption-at-rest. In addition, Synology C2 users can enable client-side encryption to make PHI data unreadable using advanced AES-256 and RSA-2048 encryption before they upload such data to Synology C2.

It is each user’s responsibility to enable client-side encryption before uploading PHI to Synology C2.

For more information on our data protection technologies, refer to our C2 Backup Data Encryption and Durability Strategy.

Synology will never access data stored to Synology C2, including PHI, unless required by the user or by law. Users maintain full control over PHI on Synology C2. Only users can amend, use, and maintain their own PHI data on Synology C2.

For more information on our approach to privacy, refer to our Privacy Statement.