Identifying content items for inclusion in a shared collection

A non-transitory computer-readable storage medium having stored therein instructions which, when executed by one or more processors, cause the one or more processors to:

• generate a persistent pooled collection of content items at a content management system, the persistent pooled collection comprising pointers that reference content items uploaded to a first user account;
• transmit an invitation to join the persistent pooled collection to the first user account and a second user account associated with the content management system;
• provide, upon accepting the invitation, the first user account and the second user account permission to access content items in, and contribute content items to, the persistent pooled collection;
• receive, from the first user account, a delete operation to delete a first content item from the persistent pooled collection;
• copy, in response to the delete operation, the first content item to a new location outside of the first user account;
• remove a first content item pointer to the first content item from an instance of the persistent pooled collection associated with the first user account;
• update the first content item pointer to reference the new location associated with the second user account associated with the persistent pooled collection;
• and
• delete the content item from the first user account and the provided permission to access the first content item from the first user account while maintaining the provided permission to access the first content item for the second user account.

A method comprising:

• generating, a persistent pooled collection of content items, the persistent pooled collection comprising pointers that reference content items uploaded to a first account;
• transmitting, to a first device associated with the first account and a second device associated with a second account, an invitation to access and edit the persistent pooled collection;
• receiving, from the first account, a delete operation to delete a first content item from the persistent pooled collection;
• copying, in response to the delete operation, the first content item to a new location outside of the first account;
• removing a first content item pointer to the first content item from an instance of the pooled collection associated with the first account;
• updating the first content item pointer to reference the new location associated with the second user account associated with the persistent pooled collection;
• and
• deleting the content item from the first account, thereby removing the provided permission to access the first content item from the first account while maintaining the provided permission to access the first content item for the second account.