Pro Base VMB4000 Pro Camera 4030 will discover or add

[Eric_VM]

Since the new Arlo app upgrade, my old pro base and my old pro cameras will not add to the new upgraded Arlo app. My question is if I buy the new PRO BASE STATION or the ULTRA BASE STATION will the old Arlo Pro cameras work on the new app?

[jguerdat]

If you mean you were migrated from the old interface that uses Library to view recordings to the new one that uses Feed, the devices in your account are still in the account - the migration doesn't affect that. If you look in the new Devices page you should see everything but you would have to manually add widgets in Dashboard by clicking on the "+" at the top and choosing to do so.

If that's not the issue, are you getting recordings in Feed from your cameras? If not, what are the LEDs on the base showing? 

To specifically answer your question, yes, the new hubs, VMB4540 and 5000, work with the old cameras. However, you would need to remove them from your account first since they are already connected to your original base.