In my case we have Office 365 subscriptions so everything is guaranteed to keep working in the future. I said it is stored on sharepoint because technically it is where it is stored. In terms of user experience it is surfaced via MS Teams (i.e. I upload it via MS teams, and I go to MS teams to get the link. but the file itself lives on the office 365 provided sharepoint server... this part of the MS ecosystem is shambles...)
