Use this tutorial to setup syncing a Teams Document Library to your Computer (cloud storage similar to OneDrive).
Syncing a channel's files
- In your chosen channel or tab, navigate to the 'Teams Document Library' that you want to sync to your Computer.
- Click the three dots located in the ribbon
- Select 'Open in SharePoint' from the drop down menu.
Your 'Teams Document Library' has now opened in SharePoint, continue with the tutorial inline. Syncing a SharePoint Document Library