Sharing Storage Folders and Access Control

You may need to share the contents of storage folders with other users or project members to collaborate. For this purpose, Backend.AI provides flexible folder sharing feature.

Share storage folders with other users

Let’s learn how to share your personal Storage folder with other users. First, log in to User A’s account and go to the Data & Storage page. There are several folders, and we want to share a folder named tests to User B.


Inside the tests folder you can see files and directories like hello.txt and myfolder.


Confirm that the tests folder is not listed when logging in with User B’s account.



If a folder named tests already exists in User B’s account, User A’s tests folder cannot be shared with User B.

Back to User A’s account and click the share icon (third icon) in the Control panel on the right of the tests folder. Enter User B’s email in the email input field and click the SHARE button to send a sharing invitation. No actual email is sent, and invitations are generated through the Backend.AI database. In the case of Permissions, if you check View, it is shared as read-only, and if you check Edit together, even writing is allowed to User B. If you want to share with multiple users, you can also click the + button to enter additional emails.


Back to User B’s account and go to the Summary page. At the bottom of the page, you can see the invitation arrived. Click the ACCEPT button to accept the invitation. If you don’t see the invitation, go to another page once and then come back to the Summary page again.


Go to the Data & Storage page and check that the tests folder is displayed in the list. If you don’t see it on the list, try refreshing your browser page. Since you have accepted the invitation, you can now view the contents of User A’s tests folder in User B account. Compared to the other folders created by User B, the tests folder has no management icon in the Control panel. You can also see only the R (read-only) mark displayed in the Permission panel.


Let’s navigate inside the tests folder by clicking the folder icon in the Control panel of tests. You can check the hello.txt and myfolder that you checked in the User A’s account again. Let’s create a compute session by mounting this storge folder with the User B’s account.


After creating a session, open the web terminal and check that the tests folder is mounted in the home folder. The contents of the tests folder are displayed, but attempts to create or delete files are not allowed. This is because User A shared it as read-only. User B can create a file in the tests folder if it has been shared including write access.


If you click the folder icon in the Control panel, you may notice that UPLOAD FILES button and NEW FOLDER button disappears and READ-ONLY FOLDER message is shown on that spot. Also modify icon and delete icon in the Action panel are also disabled since the folder is read-only. User B can create a file in the tests folder if it has been shared including write access.


This way, you can share your personal storage folders with other users based on your Backend.AI email account.


Backend.AI also provides sharing project folder to project members. To See the detail, go to sharing a project storage folder with project members.

Adjust permission for shared folders

If you click the fourth person icon in the Control panel, you can see a list of users who have shared the folder. Click Select permission to set the sharing permission.

  • View: The invited user has read-only access to the folder.

  • Edit: The invited user has read and write access to the folder. The user cannot delete folders or files.

  • Edit+Delete: The invited user has full access to the folder and can delete files or folders.

  • Kick out user: Retrieves the user’s invitation. The user cannot view or use the folder any more.



Renaming folder itself is available only for the owner, even if the user has granted Edit or Edit+Delete permission. Please note that Edit permission does not provide renaming folder.