Managing cloud file storage options
Each team (and channel) can have unique cloud storage options configured for its members. A team member might do this when they have pre-existing storage in Google Drive they intend to use alongside their channel's auto-provisioned SharePoint document library folder.
To add cloud storage to a channel's Files tab, go to the Files tab and select Add cloud storage.
From here, you can select which cloud storage provider you'd like to add to the channel's Files tab, as shown in the following screenshot. Note that this doesn't grant permission to the cloud storage location. Each individual user must also have access to the third-party provider location to be able to view it integrated into Teams:
Once a location has been added, it appears as a folder on the Files tab alongside content...