i posted this some days ago in another thread. Maybe you can use this:
latest HERE maps available: 2026.03.18 (for the Honda Jazz MK4, at least my 2026 model uses HERE navigation).
you need to format a SD card FAT32 (needs to have an USB A slot). I use a little program called Rufus (free). I have a cheap 256GB Micro SD card but I think you need at least 30GB or so. I have something like this where you can stick in a MicroSD card (see image below).
If you have a Honda Jazz mk4 (at least it works for my 2026 model) go to:
https://here.navigation.com/home/en_GB/HondaEMEA/EUREnter model
CR-V and select 2026
Then enter your VIN number (car ID number) and the Database version you are running currently.
Make sure your SD card is plugged in an USB slot and formatted in FAT32 and then press download.
Once ready you can put the SD card (via de USB A slot) in the USB data drive of your car and start the car and turn on the navigation.
Note that it takes like 45 minutes to put it on your system so it is best done when you have to drive somewhere for 45min because the car needs to stay ON. Or just sit and wait for 45min while you keep your car running.