How do I find sharepoint from a microsoft teams group / channel?

To access the SharePoint site linked to a Microsoft Teams channel, go to the desired team and channel in Teams, then click on the “Files” tab at the top. In the top-right corner of the Files tab, you'll see an option to “Open in SharePoint”—clicking this will open the connected SharePoint site in your browser. To share a master document across two Teams channels, upload the document to one team’s SharePoint, copy the link to the file, and paste that link into a post or the Files tab of the other channel. This way, both teams can access the same document from a single source without having duplicate copies.