Quick Teams Tip: syncing files offline
When working within Microsoft Teams it brings with it a Document Library and while within the Teams interface it looks self-contained, the library actually lives within Office 365 Groups.
I have been working a lot recently helping organisations migrate to Office 365 for document management. One of the big barriers I am finding to successful delivery and adoption of the solution is OneDrive for Business. However it is not necessarily for the reasons you think.