When you log into SharePoint, it will bring you to the screen below. Click on the ‘team site’.
Your SharePoint site will appear.
On the left side, click on ‘Documents’.
As shown below, the document folder will appear with all the listed folders and files.
Click on the three […] on the same row as the folder you would like to add permissions too.
Once you click the […], click ‘Share’.
The ‘Share folder’ screen will appear. Add an existing name or email address in the necessary box. At this point, you may change whether you want the user to edit or view only the requested area. Uncheck require sign-in. Next, click ‘Share,’ this will allow the user to successfully share with the email addresses added.