Is UGREEN NAS Secure? Encryption, Privacy, and Setup

UGREEN NAS stores your files on drives you control. During normal use, UGREEN does not access the photos, documents, videos, or other files stored on your NAS, as set out in the UGREEN NAS Privacy Policy.

Your actual level of protection depends on account security, permissions, software updates, remote-access settings, physical access, and independent backups.

Quick Answer: What Protects Your UGREEN NAS Data?

No single control covers every threat. Encryption protects confidentiality, RAID supports availability during certain drive failures, and backups provide recovery.

Does UGREEN NAS Encrypt Stored Files?

UGREEN NAS encrypts the files you place inside Vault. Files stored elsewhere on the NAS are protected by account authentication, permissions, network security, and physical control of the device.

How UGREEN NAS Vault works

Vault is designed for documents, financial records, identity files, contracts, private photos, and other content that needs additional protection.

How it works:

• Vault is created and managed through an administrator account.
• Each administrator has a separate, isolated Vault.
• Files must be moved into the Vault to receive its encryption protection.
• A Vault can be unlocked with its password or by importing the generated .key file.
• Other shared folders and personal folders are not included simply because a Vault exists.

This makes Vault useful when only part of the NAS contains highly sensitive material.

What happens to copies stored outside Vault?

When you move a file into a Vault, remnants of the original may remain recoverable in unallocated space on the drive. More importantly, any snapshot taken before the move still contains the readable original, and that snapshot lives on the same NAS.

If you are securing files that were previously stored in a normal shared folder, review your snapshot retention for that folder as well. Otherwise you have encrypted the current copy while leaving earlier readable copies in place.

What happens if you lose the password or key?

Store the Vault password and .key file separately. Keep the key off the NAS in at least two secure locations, such as an encrypted external drive and a trusted recovery system.

If the key is lost but the password is still available, Safes can generate a new key after the access password is changed or re-entered.

If both the password and key are lost, the Vault cannot be opened. Resetting the Safe deletes all data inside that administrator’s Safe, and the deleted data cannot be recovered through Safes.

Can files inside Safes be backed up?

Files stored inside Safes are not supported by the UGOS Pro Sync & Backup application.

Do not move the only copy of an important file into Safes. Maintain a separate encrypted backup and test that the backup can be restored without depending on the Safe.

Can UGREEN Access Files Stored on Your NAS?

During normal use, UGREEN does not access the photos, documents, videos, and other personal files stored on your NAS.

A local account keeps account and usage data on the NAS and the connected phone or computer. UGREEN does not collect personal data from local-account use unless you give express consent or voluntarily enable a feature such as the device analysis and improvement program.

Technical support may access personal files only when you explicitly authorize that access and grant the required permissions. Complex troubleshooting may require you to create or provide an administrator account. Remove that account or revoke its access after the support session ends.

Operational logs are different from personal file contents. When you request support, diagnostic information can include the NAS model, software version, IP address, connection method, system activity, errors, and feature usage.

Can Other NAS Users or Administrators See Your Files?

Access depends on the folder type, account role, and assigned permissions.

Shared folders follow their assigned permissions

Administrators can give users or groups read-write, read-only, or denied access to each shared folder.

Separate data that has different access requirements. Family photos, business documents, device backups, and application data should not share one unrestricted folder merely for convenience.

Personal folders remain accessible to administrators

A personal folder is private from other regular users, but NAS administrators retain access.

Hiding a personal folder does not encrypt it or remove administrator control. If the NAS administrator must also be unable to read a file, encrypt the file on the client device with a key the administrator does not possess.

Which UGREEN NAS Security Settings Should You Enable First?

1. Install UGOS Pro and application updates. Security fixes provide no protection until they are installed.
2. Use a unique administrator password. Do not reuse a password from email, shopping, social media, or another server.
3. Use a standard account for routine access. Reserve administrator accounts for configuration and maintenance.
4. Remove unused administrator accounts. Every administrator account can change system settings and access personal folders.
5. Enable two-factor authentication. UGOS Pro supports time-based one-time passwords through applications such as Microsoft Authenticator and Google Authenticator. Follow this guide to set up MFA on your NAS, including linking an authenticator app, testing the login flow, and storing backup codes securely. Protect the emergency verification email as carefully as the NAS password.
   
6. Enable account blocking. Repeated failed sign-in attempts should trigger a temporary block. Review any whitelist entries so an untrusted address is not exempt, and review NAS firewall allowlist and blocklist rules to make sure only approved IP addresses retain access.
7. Review trusted devices and account activity. Remove devices you no longer use and investigate unfamiliar login locations. Account Activity is useful for recent review, but it should not be treated as a permanent forensic audit log.
8. Apply least-privilege permissions. Give users access only to the folders and actions required for their work.
9. Disable unused services. Turn off FTP, Telnet, SSH, remote access, file-sharing protocols, and applications that you do not use. Enable SSH only when administrative work requires it, restrict it to trusted networks, and disable it afterward.
10. Enable the firewall. Allow only the services and network sources you require. Avoid exposing the UGOS Pro management interface directly to the internet.
11. Run Security Manager scans. Enable real-time protection and schedule full scans outside busy backup, indexing, or transfer periods.
12. Configure alerts and independent backups. A warning must reach someone who can respond, and a recovery copy must remain available when the NAS cannot be trusted.

Possible product vulnerabilities can be reported through the UGREEN vulnerability disclosure process.

What Protects UGREEN NAS from Ransomware and Data Loss?

Different controls serve different roles:

• Vault protects the confidentiality of selected files.
• Two-factor authentication reduces the value of a stolen password.
• Permissions limit which files a compromised user account can reach.
• Security Manager detects known suspicious files.
• Btrfs snapshots provide point-in-time rollback on the same NAS.
• RAID maintains availability during supported drive-failure scenarios.
• A UPS reduces the risk of an uncontrolled shutdown during a power event.

Encryption does not restore deleted data. RAID also mirrors destructive changes and provides no recovery from theft of the entire NAS.

Conclusion

Keep at least three copies of important data on two types of storage, with one copy located off-site. At least one recovery copy should be offline, isolated, or protected by immutability and retention controls.