A computer-implemented method comprising: creating, by a content management system, a folder in a namespace associated with a collecting user in response to the collecting user requesting creation of the folder; receiving, by the content management system from a first device associated with a first submitting user, a first content item with a request from the first submitting user to add the first content item to the folder; receiving, by the content management system from a second device associated with a second submitting user, a second content item with a request from the second submitting user to add the second content item to the folder; determining, by the content management system, whether the folder comprises a first sub-folder associated with the first submitting user; if the folder does not comprise the first sub-folder associated with the first submitting user, automatically creating, by the content management system, the first sub-folder within the folder and adding the first content item to the first sub-folder based on the request to add the first content item to the folder, the first sub-folder associated with the first submitting user; if the folder comprises the first sub-folder associated with the first submitting user, adding the first content item to the first sub-folder; determining, by the content management system, whether the folder comprises a second sub-folder associated with the second submitting user; if the folder does not comprise the second sub-folder associated with the second submitting user, automatically creating, by the content management system, the second sub-folder within the folder and adding the second content item to the second sub-folder based on the request to add the second content item to the folder, the second sub-folder associated with the second submitting user, the first submitting user unable to access the second sub-folder and the second submitting user unable to access the first sub-folder; if the folder comprises the second sub-folder associated with the second submitting user, adding the second content item to the second sub-folder; providing, by the content management system to the collecting user, access to the first sub-folder and the second sub-folder; responsive to receiving a request for a number of submitting users that have added content items to the folder, determining a number of sub-folders included in the folder; and sending the determined number as the number of submitting users that have added content items to the folder. creating, by a content management system, a folder in a namespace associated with a collecting user in response to the collecting user requesting creation of the folder; receiving, by the content management system from a first device associated with a first submitting user, a first content item with a request from the first submitting user to add the first content item to the folder; receiving, by the content management system from a second device associated with a second submitting user, a second content item with a request from the second submitting user to add the second content item to the folder; determining, by the content management system, whether the folder comprises a first sub-folder associated with the first submitting user; if the folder does not comprise the first sub-folder associated with the first submitting user, automatically creating, by the content management system, the first sub-folder within the folder and adding the first content item to the first sub-folder based on the request to add the first content item to the folder, the first sub-folder associated with the first submitting user; if the folder comprises the first sub-folder associated with the first submitting user, adding the first content item to the first sub-folder; determining, by the content management system, whether the folder comprises a second sub-folder associated with the second submitting user; if the folder does not comprise the second sub-folder associated with the second submitting user, automatically creating, by the content management system, the second sub-folder within the folder and adding the second content item to the second sub-folder based on the request to add the second content item to the folder, the second sub-folder associated with the second submitting user, the first submitting user unable to access the second sub-folder and the second submitting user unable to access the first sub-folder; if the folder comprises the second sub-folder associated with the second submitting user, adding the second content item to the second sub-folder; providing, by the content management system to the collecting user, access to the first sub-folder and the second sub-folder; responsive to receiving a request for a number of submitting users that have added content items to the folder, determining a number of sub-folders included in the folder; and sending the determined number as the number of submitting users that have added content items to the folder.