There are 2 ways to create a group with Zotero:
New Library... icon and choose New Group... (this will take you to Zotero.org)Groups page, then choose Create New GroupGroups can have a variety of privacy settings, and enable you to share references with a select group of people or the world.
In order to use groups within Zotero, data syncing must be enabled. When syncing is enabled, group libraries will appear in the left pane and can be used in exactly the same way as the personal library.
Groups may use file storage to store and share files among members... however, this counts against the group owner's 300 MB file storage limit. Zotero's recommended workaround for this is to create a separate account for the group leader role.
To add members to a group:
Groups and create a new group if you do not have one alreadyManage MembersSend More InvitationsFor more help using groups, see Zotero's very thorough documentation.