Add content and notes to a team in Microsoft Teams
You can upload files or folders directly to the Files tab or create a new file in any Team channel.
Upload a file or folder:
While in a channel, select Files at the top of the app, select Upload , and then choose the file, folder or template to upload.Create a new file:
While in a channel, select Files at the top of the app, then select New . Choose to create a folder, Word document, Excel workbook, PowerPoint presentation, OneNote notebook, Visio drawing or Forms for Excel. You can also create a link to a website or file.Note: Creating a new file stores the file or website within the team channel. To store and notify channel members about your link, create a link in a channel message.
To add an existing notebook to a channel, see Add a OneNote notebook to Teams.
You can upload files in the desktop or web app, and view them on your mobile device any time after that.