Review: How Private is Your Cloud Storage?

Do you store files in Dropbox, Google Drive, iCloud Drive, or Microsoft OneDrive? Do any of those files contain sensitive medical, financial, or legal data? If so, consider, cloud storage that offers better privacy.

In a hurry? In summary, is a secure, private online storage provider that has no access to the data you store. Read on for more details.

Sync: Secure Cloud Storage

Sync makes it easy to store, share, and access your files from just about anywhere. It also provides privacy protection with end-to-end encryption, ensuring your data are safe and secure in the cloud.

Check Out Sync
We may earn a commission if you click this link and make a purchase at no additional cost to you.

The Threat

When you put files in Google Drive, Microsoft OneDrive, Dropbox, etc., those platforms encrypt your files. However, the platforms own the encryption keys. That means they can see your files. It also means that if the government requested your files from those platforms, they could provide them.

Maybe you have files that contain highly sensitive medical, financial, or legal data, and you don’t want to run the risk of those files falling into the wrong hands.

You may think, “I trust my storage provider, so what’s the problem?” Maybe you trust the company itself, but do you trust every one of its employees? And what if the company is hacked? Or what if a government (one in your country or a foreign one) wants to see your data?

If these possibilities concern you, then you should consider a zero-knowledge storage provider. Zero-knowledge encryption is a form of encryption in which the service provider has no knowledge (zero-knowledge) of your encryption key, so the provider is not able to view your data. A zero-knowledge storage provider can’t view the files you store on its servers. Overview

In addition to providing secure storage, also provides secure sharing of files with other people, secure syncing of files between devices, and secure backups. We’ll take a closer look at these features.

Many features are available from the website, on any device. You can also install software on the following systems:

  • Windows
  • Mac (macOS)
  • Linux
  • Android
  • iPhone
  • iPad is based in Canada.

Security is a zero-knowledge, end-to-end encrypted storage provider.

We can’t read your files and no one else can either.

Sync doesn’t collect, sell, or share your personal data or app usage information to advertisers or third parties, and we do not claim ownership of your data.

With any online account, and especially with accounts that guard sensitive data, it’s important to have strong security in place. provides the following security features:

  • Two-factor Authentication (2FA), via authentication app (Authy, Google Authenticator) (recommended method) or email
  • Automatic log out of web browser sessions after 1 or 24 hours
  • Disallow editing of shared files (allow view only)
  • Disallow downloading of shared files (allow view only)
  • Set expiration dates on shared links
  • Download limits (limit the number of times a linked file can be downloaded)
  • Password-protected sharing
  • Granular permissions (per-user, per-folder)
  • Remotely delete shared files
  • Remotely disable lost or stolen devices from accessing your files
  • Email notifications of activity on your links
  • Lock mobile apps with PIN or passcode

Your files are encrypted using a key that’s based on your account password. doesn’t know your key or password. When you upload a file to, it’s encrypted on your device before being sent to The file remains encrypted until you retrieve it from

For this reason, it’s critical that you securely store your password. If you lose it, you’ll lose access to your files! I recommend keeping your password in a password manager such as LastPass. You can even use LastPass to create a strong, unique password.

LastPass: Secure Password Management

LastPass helps you remember and manage your secure passwords all in one place. Never forget a password again.

Check Out LastPass
We may earn a commission if you click this link and make a purchase at no additional cost to you.

If you fear losing access to your data because you lose your password, you can consider enabling the password reset option. However, doing so gives temporary access to your encryption keys when the feature is enabled or used. I recommend you leave this option disabled. Password reset

If someday you decide to stop using, you can delete your account, which will delete all data you have stored in it. Delete account lets you set a Display Name, which is the name people see when you share files with them. If you’ll be sharing files with people you want to hide your name from, set this to something that doesn’t identify you.

File Sharing

There are two ways to share files that you put in

  1. Create and send a link to the file
  2. Put the file in a shared folder Create new share folder Manage link Shared Folder

When you share a link to a file or folder, you can choose the following settings:

  • Set password
  • Set expiry/expiration date
  • View-only (no download)
  • Set download limit (limit number of times file can be downloaded)
  • Email notifications (get notified about link activity)
  • Enhanced privacy (an additional layer of end-to-end encryption, not compatible with all browsers)

You can delete a link to revoke access.

Someone who receives a link can view or download (if allowed) files you share without needing a account. To edit files in a shared folder, they’ll need a account.

An interesting feature is File requests. If you need to securely receive files from others, you send them a link, and they can upload directly into a folder you link to, using a web browser. They don’t need a account to do this. It’s secure and convenient for both parties.

File Syncing

When you install the software on your device, you’ll get a Sync folder. Any files you put there are continuously synced to, and to any other devices where you’ve installed the software.

On Windows and Mac, you can use selective sync. If there are any folders that you don’t want to sync to a device, just open the preferences on that device, and uncheck those folders. If you want to see those folders in the future, you can check the boxes for those folders, or open in your browser.

On mobile devices (Android, iPhone, iPad), the mobile app can automatically sync your photos and videos to your account and connected devices. You can choose to upload only photos, not videos. However, if you enable photos, it syncs all photos, and if you enable videos, it syncs all videos. You can’t choose which photos and videos are uploaded.

File Backup automatically backs up your files. You can easily restore deleted files and previous versions of files.

Paid plans keep previous versions of files, and deleted files, for one year. So, you can restore them for up to a year after changing or deleting them. Previous versions and deleted files don’t count against your storage quota., as its name implies, is all about syncing files between devices. But they also have a Vault feature that is just for online storage, and doesn’t sync to other devices. This is useful if you just want to back up files to the cloud, without having them synced to your other devices.

You manually copy files into the Vault, from your device, or your Sync folder. Vault Pros and Cons

I’ve already covered several of the positive aspects of

  • Zero-knowledge encryption
  • Strong security features
  • Secure syncing between various platforms
  • Secure file sharing
  • Ability to securely receive files from others
  • Robust restoration and versioning

As much as I’d love to say is perfect, the truth is that there are some negatives (or potential negatives) you should be aware of.

Some people complain that uploading, downloading, previewing, or accessing files on is slow. They blame it on the encryption. You may (or may not) notice a delay, depending on the speed of your device, the speed of your Internet connection, and the size of the file.

Support is only available through a contact form. There’s no live chat, phone, or other support.

Only images and documents can be viewed within a browser. For other file types (such as audio and video), you’ll need to download the files before you can view them.

Some storage providers, such as Dropbox, integrate with third parties. That lets you transfer files back and forth between the storage provider and the third-party software. doesn’t allow such third-party integration, which you may find inconvenient, but it does increase security.

You can’t simply drag and drop files into the web interface. You need to first click Upload, then you’ll get a box that you can drag and drop onto.

It would be nice if you could sync any file or folder on your device, rather than having to put them into the Sync folder. But, this is how Dropbox and similar file-syncing services work, so it’s no surprise. doesn’t support block-level sync. That means that when you edit a file that’s in, the entire file needs to be re-uploaded, rather than just the changed part. This makes syncing slower, especially for large files. But, it’s part of the price you pay for’s zero-knowledge encryption.

If you install the app on a mobile device, and enable photo upload, it syncs all photos. If you enable video upload, it syncs all videos. You can’t choose which photos and videos are uploaded. says “Sync will not disclose your personal information to any third parties without your consent, except under the following limited circumstances: … To comply with a legal process such as a law, regulation, search warrant, subpoena, court order or law enforcement request …” is based in Canada, and Canada is a member of the Five Eyes, Nine Eyes, and Fourteen Eyes alliances of countries that share intelligence with each other. So although’s encryption prevents them from sharing your encrypted files with law enforcement, they’ll likely have metadata (data about your account, usage, etc.) that they could share upon request. Price is $8-15/month, depending on the plan, for its Pro Solo plans. You can only pay per year, not per month.

All plans have the same level of privacy. The difference is the amount of storage (2, 3, or 4 TB), and the amount of file history and recovery (180 or 365 days). also has Personal plans for $0-60/year, depending on the plan. These plans are more limited than the Pro Solo plans.

In addition to credit card and PayPal, accepts Bitcoin, so you can potentially pay anonymously, if you’d like. Review: Who Is It Best For?

Because of its emphasis on privacy, is best for people who want serious privacy for sensitive files, such as those that contain medical, financial, or legal data. People who don’t want to worry about individuals, companies, or governments viewing their files will be pleased with’s data protection. is also a good choice for businesses that need to comply with privacy regulations, such as GDPR and HIPAA. complies with privacy regulations in the US, EU, UK, and Canada.

What You Should Do

  1. Define what you want in an online storage provider. Start with what you’ve learned in this review.
  2. Decide if will work for you.
  3. If you choose, install and configure it. Enable security features on your account. Securely store your password and other important details.
Sync: Secure Cloud Storage

Sync makes it easy to store, share, and access your files from just about anywhere. It also provides privacy protection with end-to-end encryption, ensuring your data are safe and secure in the cloud.

Check Out Sync
We may earn a commission if you click this link and make a purchase at no additional cost to you.

Leave a Comment