Frequently Asked Question
Go to your SharePoint homepage and find your group site:
You can then navigate through the Documents using this familiar folder system.
Locate your file and click the vertical ellipsis, or right click the document to see your options
Or if the document is in your personal file store (also accessible via OneDrive) click My Files to open the folder view (it's the subheading link underlined, in this case OneDrive > Ben Ackers)
This will take you to the folder view of your SharePoint documents, where you can find the file you want to share.
This brings up the sharing popup, the same as it is in OneDrive
You can then share with another user or a group. This sends an email notification to your users. Using the pencil icon, you can change whether the invitation is to View or Edit.