Synology NAS Cloud Backup and File Restore Guide

Updated 5 November 2026 · Standard formula, shown below

Backing up a Synology NAS to cloud storage gives you an off-site copy of important files if the NAS is damaged, stolen, or affected by accidental deletion. You’ll use Synology’s Hyper Backup package to create and schedule a backup, then use its restore tools to retrieve files when needed. Before starting, confirm that your DiskStation supports Hyper Backup and that you have an account and enough space with a supported cloud destination.

What You’ll Need

A Synology NAS with DSM administrator access and Hyper Backup installed from Package Center.
A supported cloud storage account, with its sign-in details and any required permissions. Available destinations can vary by DSM version, region, and provider.
A reliable internet connection and sufficient cloud storage for the selected data, plus room for backup versions.
A list of shared folders and application data you want to protect. Decide whether any files should be excluded.
Optional: a password manager to store encryption credentials, and a second device for testing recovery.

Step-by-Step

Check the source data. Sign in to DSM and confirm the files you intend to protect are present and accessible. Review shared folders in Control Panel and note which ones matter. A backup task cannot protect folders or applications you do not select. If the NAS is nearly full or showing storage errors, resolve those issues first.
Install or update Hyper Backup. Open Package Center, find Hyper Backup, and install it if necessary. If it is already installed, check for an available update. Package and menu names may vary slightly across DSM versions. Use an administrator account for setup, but avoid sharing its password or cloud credentials.
Create a backup task. Open Hyper Backup, choose the plus button or create-task control, and select a cloud service from the remote backup destinations. The exact list depends on the NAS and DSM version. If your provider is not listed, check Synology’s current documentation for supported connection methods; do not enter credentials into an untrusted third-party tool.
Authorize the cloud account. Follow the on-screen sign-in and permission prompts. Read the requested access carefully and grant only what the service requires for the backup. After authorization, select the destination region, storage location, or bucket when prompted. Give the task a clear name, such as “NAS off-site files,” so it is easy to identify during recovery.
Select folders and applications. Choose the shared folders to back up, then select application data if Hyper Backup offers it and you need it. Application backup availability depends on the installed package and destination. Review the selection screen rather than assuming every NAS setting is included: a file backup is not necessarily a complete DSM system image.
Configure backup options. Choose a schedule that runs after major file changes but does not interfere with heavy NAS use. Enable a backup integrity check if offered. Consider client-side encryption if confidentiality is important; set a strong password and save it somewhere separate from the NAS. Without the encryption password or key, encrypted backup data may not be recoverable, even by the cloud provider.
Set version retention. Enable rotation or version retention if you want to recover an earlier version after a file is changed or deleted. Select a retention policy that fits your storage allowance. Keeping versions can consume substantially more cloud space than keeping only the latest copy, particularly when files change often.
Run and verify the first backup. Start the task and leave the NAS connected to the internet until it completes. The first upload can take hours or longer depending on data size and upstream bandwidth. In Hyper Backup, check task status and the event log for errors. Confirm that the task reports success and that the selected destination and data are correct before relying on it.
Test a small restore. In Hyper Backup, select the task and open the restore function. Browse the backup, choose a small test file, and restore it to a separate folder or another safe location. Open the restored copy to confirm it works. A successful backup status is useful, but a test restore checks that you can actually retrieve data.
Restore files when needed. Open Hyper Backup, select the relevant task, and choose the file or folder restore option. Browse by folder or backup version, select the items, and choose the original location or a different destination. Restoring to the original path may overwrite existing files; if you need to preserve current versions, restore elsewhere first and compare. Wait for completion, then check permissions and open representative files.

Common Mistakes

Assuming the whole NAS is covered. Hyper Backup protects only the folders and supported application data selected for that task. Review selections after adding new shared folders or packages.
Forgetting encryption credentials. Keep the encryption password or exported key in a secure location separate from the NAS and cloud account. Do not store the only copy inside the backup itself.
Ignoring version retention. A current backup can mirror an unwanted change or deletion. Retained versions help recover older data, but require additional space.
Never testing recovery. Test a representative file periodically and after changing the task, account, or encryption settings.
Confusing sync with backup. A synchronization service may replicate deletions or unwanted changes. Use a backup task with versioning for recovery history.

Tips

Schedule the initial upload when the NAS and connection are less busy; later incremental runs usually transfer only changed data, though processing and transfer time vary.
Use a dedicated cloud account or storage location for NAS backups where practical, and enable the provider’s account protections.
Keep a second backup copy for especially important data. Cloud backup protects against many local failures, but account loss, provider outages, or configuration mistakes can still affect access.
Review task logs, available cloud space, and the last successful run regularly. Recheck the task after DSM, package, account, or folder changes.
For a NAS replacement, install Hyper Backup on the replacement, connect to the existing cloud task, and provide the encryption credentials if requested before browsing the archive.

Troubleshooting

The cloud destination will not connect: Check the NAS internet connection, DSM date and time, and the provider’s service status. Reauthorize the account if its access token expired. If sign-in loops or permissions are denied, confirm the account has access to the selected storage location and consult the provider’s current authorization instructions.

The first backup is slow or fails: Check available upstream bandwidth, cloud quota, and Hyper Backup’s event log for the specific cause. Large initial uploads take time. Retry after correcting connectivity or quota problems, and avoid repeatedly creating new tasks, which can make the destination harder to manage.

A file is missing from the archive: Verify that its shared folder was selected and that the backup completed after the file was added. Check exclusions and browse an appropriate backup version. Newly added folders are not automatically included in every existing task.

Restore is blocked or produces an unusable file: Confirm that you selected the right task and version, that the destination has enough space, and that your account can write to the restore location. Check permissions after recovery. For encrypted backups, verify the exact password or key; it cannot generally be replaced by resetting the cloud account password.

The NAS is unavailable: On a replacement Synology NAS, install Hyper Backup and use its restore workflow to connect to the existing destination. Keep the original cloud account details and encryption key available. If the destination format or package has changed, check Synology’s recovery documentation before modifying or deleting the existing archive.

Frequently Asked Questions

Does Hyper Backup run automatically?
Yes, if you configure a schedule. Check task status and logs to make sure scheduled runs complete successfully.

Can I restore one file without restoring everything?
Yes. Browse the task’s backup contents, select an individual file, and restore it to its original or a different location.

Can I restore an older version of a file?
Usually, if the task retained versions from before the change. Choose the relevant date or version in the restore browser.

Will cloud backup restore DSM settings and installed packages?
Not necessarily. Hyper Backup can include supported application data, but a selected-folder backup is not a complete replacement for separate system-configuration or package recovery procedures.

What if I lose the encryption password?
You may be unable to decrypt and restore the backup. Keep the password or key in a secure, independent location and verify it during a test restore.

How often should I test a restore?
Test after initial setup and periodically afterward, especially after changing the destination, encryption, retention, or backup selections.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.