Account

Yes. All updates and upgrades are included for the duration of your subscription.

Audit trail & revision control

Open the Storro application, select the project of choice and go to the History tab. At the top you will see a horizontal time line in which blue bars indicate on what day(s) changes have been made. Select the right date and scroll thought the snapshots until you have reached the state of choice. Selecting one gives you the option to return to that state of the entire project (the complete project folder structure and all contents) by clicking the clock icon (Restore state) top right. Should you only wish to go back to the state of a specific subfolder or file, then click the clock icon (Recover) behind the folder or file of choice.
Open the Storro application, select the project of choice and go to the History tab. At the top you will see a horizontal time line in which blue bars indicate on what day(s) changes have been made. Select the right date and scroll thought the snapshots. Each snapshot states what file has been changed and by whom.

In the Dashboard tab you have an overview of the most recent changes per project; who has made them, when and in which file.

License

Purchasing and extending of licenses can be done in the application that is downloadable for free.
In the application, click the hamburger menu top right and go to License. On the left side it shows a button New license group that you will need to distribute licenses. On the right side you can manage the licenses you own. Click on the License button and subsequently Update License. A webpage opens in which you can enter the amount of licenses you wish to purchase.

Distributing purchased licenses is done by creating a New license group. You can add contacts by clicking the Members button, entering their email addresses and clicking Invite. Upon accepting this invite, your contacts will become part of this license group and can use Storro for the duration of the license you purchased.

Member of the license group with the assigned role of Administrator can extend, revoke and dispense licenses. Having multiple Administrators in a group can be convenient to increase the chance someone is available in case of urgent requests.

Support & trouble shooting

Storro supports Windows (7 and up), MacOS (Yosemite and up) and Linux (Ubuntu 18.04 64-bit). You will find all installer files on our Download page and clicking the OS icons.

Next to running on desktops and laptops, the Storro application also runs (headless) on physical and virtual servers, hosted in- or externally.

At this time Storro supports computers running on Windows, MacOS or Linux. In the future OSX, Android and Windows mobile will be supported as well.
Your virtual Storro drive is mounted automatically when running Storro. (Re)start Storro to get access to this location and refresh all finder windows.
In the event that Storro crashes, we would appreciate it if you would let us know what actions you were performing at that moment. To investigate the issue and prevent it for the future we ask you to send us your latest two log files. These can be found by clicking the hamburger menu top right in the application and choosing About. At the bottom of this screen it shows a button Open log files location. Please send the two latest log files and a description of what you were doing to support@storro.com.
Should you have questions concerning Storro that are not mentioned in the FAQ, please use our website’s chat option bottom right, send an email to support@storro.com or call +31 20 308 0218. We will so our best to help you as soon as possible.

Price & payment

Storro’s pricing can be found on our Download page.

After the 30 days free trial (no strings attached, no payment details required) you can choose annual or monthly subscriptions. With purchase of an annual subscription you receive a 20% discount.

Open the Storro application and click the hamburger menu button top right. Select License and click the License button below your avatar. The page that opens shows the end date of your subscription.
Both monthly and annual subscriptions expire after the set duration, without tacit renewal. Running subscriptions cannot be paused or cancelled.
Before expiration of a trial or subscription you have the option to purchase a (new) license via the application. By doing so you continue to enjoy Storro’s full functionality.

Should you decide not to renew a subscription, then you get limited functionality; you can no longer change and add information to shared projects or go back to previous versions of files and folders. You will continue to be able to access and copy the information in Storro in the state of when the subscription expired. Should you decide to renew your subscription at a later date then you will regain access to Storro’s full functionality.

Security & privacy

With Storro your data and you enjoy unprecedented security and privacy. At https://storro.com/en/technology we explain in detail how this has been technologically executed, and what guarantees this offers. Summarized, your information is protected as follows:

All data in Storro is automatically encrypted to make it unreadable to unauthorized actors. This encrypted file is then cut into small data chunks that are each sent over a separate encrypted connection (RPC) to your project members as to prevent man-in-the-middle attacks. As Storro doesn’t know a central component, like a server, it’s very complex to attack. Your data is stored spread out over the devices of you and your team members – the people that actually need access to it. No third party, including us, has a copy of this data or the keys. So even if the encryption algorithm were to be compromised, your data remains private. Furthermore, user rights are not software based –as is standard- but cryptographically enforced to prevent abuse. All actions in a project are captured in a private blockchain to ensure indisputable, transparent audit trail and revision control that lets you go back to any previous state of a file, folder or project. For the many differences with how cloud services work, please see the question What is the difference between Storro and cloud services such as Dropbox, Google Drive or OneDrive?

The little information that we have of you is not given to third parties, unless legally obliged as described in our privacy statement.

Storro uses both symmetrical and asymmetrical encryption. The fundamental cryptographic algorithms used in Storro are::

  • Keccak-f₁₆₀₀ for all symmetrical encryption
  • Curve25519 for all asymmetrical encryption

These algorithms have no known weaknesses. All keys are generated locally and are solely in possession of the data owner(s). See https://storro.com/en/technology for more information.

Your files are stored encrypted and compartmentalized on a virtual drive (default location S:) on your own hard disk. When it concerns a shared project, it’s also stored on the hard disks of these project members. Storro creates a view on your data so you can work in it, but the data on disk remains encrypted at all times for protection. The virtual drive is approachable via the application and your finder when Storro is running. When you quit the application, the virtual disk disappears and only encrypted data chunks can be found on your system.
Only you have an overview of the projects you are in. Others can only see the shared projects they have been invited to. The Storro company has no insight in any of your projects.
Only Administrators in a project can remove project members. As an Administrator you can remove them in the Members tab. Click on the avatar of the member of choice, then on the Actions button bottom right and finally on Remove this user.

In case you have invited the wrong person and you Remove this user before it has accepted the invitation, then the invitee does not receive any information of the project (apart from the sent email). The invite can no longer be accepted.

In case you wish to remove a user after it has accepted the invitation and synchronized, this member will have access to the project data in that state. By removing said user it will no longer receive updates or changes being made.

Projects

Open the Storro application. By clicking ‘+’ (New secure project) top left you create a new project folder. When this main folder has been created using the application, sub folders are easily created in your finder and complete folder structures and files can be pasted/dropped in as well.
Open the Storro application. Select the project of choice and go to the Advanced tab. By clicking the red Leave and remove button you are leaving this project. The project folder with all its contents and the blockchain audit trail will be deleted from your system.

Note: after doing so you will not be able to go back to a previous state of this project or its data on your system anymore.

By hovering over the avatars of your team members in the Dashboard tab of a specific project, you can see when you have last synchronized with them.

Storro synchronizes automatically with your online contacts in all your projects when starting the application and coming online. The syncing status is visualized as a dot on the avatar of a contact in grey (contact is offline), orange (synchronising) or green (synchronised).

Only Administrators in a project can change a project’s name. As an Administrator in the project of choice you can go to the Advanced tab and click the Edit button top right.
Open the Storro application and select the project of choice. In the Members tab you can see which members the project has and what role they have.

Administrators and Participants have can read and write. Observers can only read, and Facilitators do not have access to any files but function as an answering machine with encrypted deltas for offline members.

The user rights apply to any level within said project.

Simply select the Storro drive in your operating system’s finder and search in the usual way.

Project members

Storro has four user roles:

  • Administrators can read and write all files in a project, can modify the project’s name, and add or remove users.
  • Participants can read and write all files in a project.
  • Observers can read all files in a project.
  • Facilitators cannot read nor write. They only store encrypted project changes (deltas) and synchronize these with offline project member when they come online. Effectively they function as an answering machine for encrypted data. Storro offers you a free Facilitator for each shared project in for of the Distribution service, but you can also appoint your own devices and servers (both physical and virtual). A Facilitator guarantees that your team is always up-to-date, working with the same information.

Having multiple Administrators in a group can be convenient to increase the chance someone is available in case of urgent requests.

Because Storro works with cryptographically enforced user rights to prevent abuse, members need to be removed from a project and invited in their new role.

As an Administrator you can remove them in the Members tab. Click on the avatar of the member of choice, then on the Actions button bottom right and finally on Remove this user.

Adding a member is done in the same Members tab. Click Add members, enter the email address, assign a role and press Invite at the bottom of the screen.

Only Administrators in a project can add members and send invitation emails.

Open the Storro application and select the project to which you would like to add a member. Go to the Members tab and click Add members. Enter the email address, assign a role and press Invite at the bottom of the screen.

Should you want to send the invitation email to someone again, go to the Members tab and select said user. Click the Actions button bottom right and then Resend email invitation.

In case it concerns a Storro user that’s already a contact and you don’t wish to invite this user in-app but specifically per email (e.g. when someone has a new device), then enter the email address in full. After doing so multiple options will appear in a dropdown menu. Select Email invitation.

Open the Storro application and select the project to which you would like to add a new member. Go to the Members tab and press the Add members button. Enter the email address of the invitee, assign a role and click Invite at the bottom of the screen.

For more information on roles of members see the question What is the difference between an Administrator, Participant, Observer and Facilitator?

Only Administrators of a project can add or remove members in that specific project. You can find your role in said project in the Members tab.
The Storro Distribution service is a free Facilitator node that is added to each shared project by default. Facilitators store encrypted project changes (deltas) and synchronize these with offline project member when they come online and other members may be offline. Effectively they function as an answering machine for encrypted data. It guarantees that your team is always up-to-date, working with the same information. Facilitator nodes not have the keys to read information.

You can remove the Distribution service from specific projects as an Administrator in the Members tab. Select the Distribution service, press the Actions button bottom right and then Remove user.

Should you want to disable the automatic addition of the Distribution service in shared projects, then click the hamburger menu top right, select Application settings and untick the box Use Distribution service by default when starting a new project.

You can also appoint your own devices and servers (both physical and virtual) that are online 24/7 to the role of Facilitator.

Functioning of Storro

The size of projects and files is not limited by Storro but by the available space on the hard disks of you and your project members. There is also no limit on the amount of synchronized data or the amount of changes made.
Storro is compatible with any file type.
Storro guarantees true end-to-end protection of your information when all parties involved work with Storro. The application can be installed, or run without installation rights by selecting ‘Skip driver during setup.

Should you want to share a single file with a contact that can’t/won’t download Storro, then you can generate a link that enables the recipient to download the file directly from your system and others in the project.

To generate a link for a specific file go to the Files tab in the application. Here you can go through the project’s folder structure. Click the three dots behind the file of choice and select Quick share. Enter how long it should be valid for and send the copied code to your contact(s).

Note: the system of you or a synchronized project member (Administrator, Participant or Observer; not a Facilitator) should be online at time of the download by the recipient. Despite being sent over an encrypted connection, the file itself is decrypted before transfer so that the recipient (without keys) can read it. This entails that the file will be stored on the recipients system unencrypted, and you will have no more insight in what happens to it.

When installing Storro your firewall may ask you to grant Storro permission to connect with the internet on private and/or public networks. By indicating that it may you make full use of the application.
Storro uses private blockchain technology, meaning that a cryptographic chain is created for each individual project of which the information is stored distributed only over the systems that should have access to its content: the project members. No one outside of the project team has a copy of, or insight in this, hence the term ‘private’.

In this crypto chain the user rights (roles) of the project members are captured to prevent manipulation. Furthermore, every change (the metadata, not the content itself) to a project, subfolder or file is recorded in here to form a very reliable yet lightweight blockchain audit trail. This also provides the option to go back to every previous version of a file, folder or entire project, preventing abuse. Besides it guarantees that every project member has an indisputable, transparent image of all the project’s activity and information.

Storro’s private blockchain implementation requires very little computing power and functions without tokens or voting.

Putting your information it a cloud simply means storing it on servers of third parties. This gives those parties the possibility to go through your information, as well as give access to fourth parties such as (foreign) government agencies. All of this happens on a large scale. Because millions of organisations are storing their information on the same servers, they become an alluring target for malicious actors, and vulnerable to massive data breaches.

With Storro you don’t have to trust any third parties because you store your information (encrypted, compartmentalized and decentralized) with those that actually need access to the files; your project members. Outside of these contacts –selected by you- no one get neither readable nor complete information, let alone the keys to it. That includes us. That’s why your data and you enjoy unprecedented security and privacy.

Read more about the technological execution and the guarantees this offers you on https://storro.com/en/technology.

Storro is developed in the Netherlands and wholly Dutch owned.