If not already covered here, the New MBP will take the old Transcend JetDrive Lite cards. They work fine and are nearly flush. The Niftydrive however, does not work. Not deep enough to hit contacts.
So if you have some old Jetdrives lying about (I have two 128GB cards from my 2015 MBP), you can put them back to work.
So if you have some old Jetdrives lying about (I have two 128GB cards from my 2015 MBP), you can put them back to work.