When ever I add a contact to share drive it defaults to send that information to the email address under that person’s profile. Not the mobile number.
the only way I can get the shared information to a person’s Mobil number is by clicking on the message button. So the search box will not work to share to Mobil number.
So bottom line is that it’s a long process to share a drive with a contact that has an email address listed under their profile.