If it's helpful,
I downloaded EUR_9PR085_FCT3WS-22105_Offline_Update.tar from
https://app-connect.volkswagen.com/mapupdates/en/download/ (selected VW ID.3 as Model, MIB3 as Infotainment system).
After extracting to a USB stick and plugging it in, it appears to have successfully updated from 21.2 to 22.6 (but the VW download page says the file was updated 28/11/2022).
I have no idea if it successfully transferred all 30GB of files/data, there is no on-screen info to tell you it's updating or any progress indicator, which is a bit crap.
I might try again later with a SEAT-specific update file (EUR_8PR073_FCT3WS-211G8_Offline_Update.tar) from
https://www.seat.com/owners/about-my-car/navigation-systems/leon-2021, this appears to be more recent than the latest on the Irish or UK SEAT websites (but less recent than the latest on the VW site above).
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That's good news then. The VW navigation files traditionally have been more up to date than the other VAG brands, the only exception was Seat had South American mib2 standard navigation files that VW didn't show a few years back.
The mib2 high files you can poke about in and see when they were finalised although you must be careful you don't save anything when opening them up. Possibly / probably the date on the website wasn't updated.
On being able to do it I quess the question is whether the car had complimentary one year Mapcare and it went thru on that basis. You'll find out in the long term.
It looks like the mib3 updates are indeed common across the brand. How it works on mib2 it knows which brand it is in from a flag in the firmware that says what brand it is, Seat, VW, Skoda, Audi then any specific POIs to the brand get brought out. You get no preferred preference in using the map file released on the brands website since it's the same release that's going to be defined by the YY.MM shown on the screen.
The mib3 files inside them look like a cross between mib2 standard and mib2 high. The design of mib3 is for connected modular uploads but with that off line update. The online modular uploads, upload just the zone that's required for a route. Some people use the trick to put in a route to a far off place to force an update.
@dan555 told me that trick.
I don't have mib3 but keeping an eye on the navigation side. It uses Here Maps cartography I recognised some of my own digitised roads in it when I sat in the dealers. Oh yes, that's one of mine as we looked at the entrance roads to a country hotel
.
I'd say the finished update will be when you see YY.MM change. Mib2 high takes the navigation out when you do the update. I always do mine via a back end menu so never experienced that one, I see it go through as a macro script that it's running.... but that's just me. I like to see the progress.
Footnote:
The VW downloads as a webpage have gone into hiding unless you register your VW.
The direct links to November 2022 have been posted on the 4th post here:
forum-auto.caradisiac.com
Whether the guy will keep these up-to-date on that post we'll see. Tradionally these links are posted up once identified. That guy has found all previous VW files.
At the minute few people are posting these links identified by a Google on the filename.