Share or create unique permissions for a folder

In a document library, hover over the folder and right-click it. Select Manage access.
In the right-hand pane, select the + beside Direct access.
- To remove groups or individuals, select the pencil icon next to a group or individual > Stop sharing > Remove.
Enter the name of the individual or a SharePoint group.
- To add multiple users, separate their names/addresses with a semi-colon beforehand and paste it in the field.
- Select the pencil icon to choose the access level.
- You can enter a message and check/uncheck Notify people to send a notification.
Select Grant access.
- If you're granting access to an external user who's system isn't on O365 or encounter an error, use the Share option in the Manage access pane.
- To enable external sharing on the site, contact EASI SharePoint Support.

If you can't set up permissions, it may be due to lack of access. Contact the site owner or EASI SharePoint Support for assistance.