The experts I'd say are
@East Yorkshire Retrofits that may give you a free pointer.
There seems to be two series, one covers the
Ateca,
Formentor, Leon 4 and they are XXXX. The other for lesser models
Ibiza, Arona YYY. Three and four characters.
Mib helper is a bit like an AI system if it pushes you in the wrong direction you are stuck. Mib solutions is a repository of firmware but no board to say which to use / discussion thread.
East Yorkshire Retrofit that sell the firmware, their website offers a useful check to see what they are offering and being a board sponsor offer free advice.
Looking at their website nothing for mib3 jumps out at me although in the past it did....
As for over the air mib3 updates you need to have a valid connect services login and not set it as hidden or restricted. A few lunatics did this in the past it was said you didnt get the beep from the emergency call, that may be true, but thats a bug and should be fixed under warranty, telematics unit. They didn't want to be tracked but if you do that you don't get the firmware updates.
All things being equal, good 4g signal, not restricted your user as guest or whatever it is, withing the free period you should get the upgrades.
Over to
@East Yorkshire Retrofits who I'm sure will fill in any bits I've missed. The Seat site documentation may not be upto date.
BTW for mib2 firmware there is a long running informative thread
Try another cable to test. Maybe bad usb port
www.seatcupra.net
Back on topic when East Yorkshire use to sell the mib3 files people got stuck that they were using USB A to USB C adapters. This is quite common. Not fully wired. You use a reversible USB as per the thread in that situation.
I want to update the firmware of the infotainment system (Discover media) of my 2018 Arona. I now have version 0468 and the latest is 0480. I have already downloaded that (from mibsolution.one). I watched some videos on YouTube where firmware updates were performed on Discover Media systems and...
www.seatcupra.net
You have the Mac one if using a Mac, you need to use CleanMydrive to remove Mac garbage else it won't see the firmware update, ditto with map updates.
Similar to mib2 high the unit does a signature validation check so any garbage in the files and it won't see the update.