TC volume needs to be unmounted in order for gDrive/Dropbox to be able to sync it. For that you need to close all apps that are currently using any files on tha

TC volume needs to be unmounted in order for gDrive/Dropbox to be able to sync it. For that you need to close all apps that are currently using any files on that volume. That's not exactly easy-breezy. In fact, it's a major pain in the ass, so - no, this is not a practical option.