PSA NAC RCC Updates

[gcdec]

Hello, I had no problem a few months ago updating my maps to 20.0.0-r0. My car is wave 4, and has the most up to date firmware installed 44-07-33-32_NAC-r0. I saw there was a new map update 21.0.0-r0. I downloaded it. I formatted my 32gb sandisk usb stick to Fat32, and using 7zip sent files straight to usb stick. I am using windows 11. Went in my car and started it and turned off start stop, engine running, but every time I insert usb stick in car and press install on the screen a message comes up straight away saying map eur failed. Cant understand why as I have done exactly the same as I did with the map update 20.0.0-r0. If someone could help me get this problem sorted I would be so so grateful. @rui_saraiva

Can anyone confirm they have successfully installed map update 21.0.0-r0

Is there anyone on here that can help me - the Sandisk 32gb usb stick was brand new and only used once to install map update version 20. But no matter what I do I cant get map update 21 installed.

You should first see a warning about no media files in the USB flash drive. That is expected (in fact, there aren't any audio or video files in the update) and you should just ignore that message. That also means the USB flash drive was correctly FAT32-formatted and the car could read its contents. A few seconds later you should see a message asking if you want to update the maps.
Any error after this message is usually related to:
- Update prepared in a macOS system that automatically writes extra system files to the USB flash drive. The update fails when computing the checksum of folders with those extra files (Not your case);
- The extraction utility doesn't support PaxHeaders (old versions of 7-Zip, for instance) and/or automatically convert text files (WinZip does that "smart CR/LF conversion" in its default settings);
- The USB flash drive itself might have bad flash memory. Also, many cheap drives are sold with an expected size, when, in fact, they only have a fraction of that space. File corruption occurs;

Ok purchased a brand new Kingston 32gb usb stick. Extracted folder swl and xml file. Car running inserted usb stick and update failed, see screenshots. The firmware has never been touched by me. I installed map update 20 with no problem, just don't understand why it's failing as I am doing exactly the same for map update 21 as I did with map update 20. Windows 11 and latest 7zip. Start stop off, car running, not in eco mode.

[gcdec]

I have tried everything I can to get version 21 installed, but soon as I click install it comes up map eur failed. New Kingston usb stick 32gb, Windows 11, latest version of 7zip, only swl folder and update.xml on usb, start stop off on car, not in eco mode, drove around for 15 minutes and engine still running before inserting usb into car port. So so weird, map up date version 20 installed for me on first attempt. Even checked today in nav settings to make sure version 20 is installed and it is. Totally baffled and really could do with some help and some brains please please.

[Mogresha15]

Hello everyone,
@rui_saraiva
Your site saw that my car (c4 cactus 2019) is wave 3 with a * mentioned that it's upgraded to wave 4
My car's current system version is 31.09.46.62_NAC-r0
Citroën app shows recommended version 42.03.33.42_NAC-r0 (that's not compatible after trying & as i understand that it's expired.
Shall i download the same version but wave 4 from your site?
Thank you