Needs to be put on a Vag navigation card nit a normal SD card.
A fair few people make errors in the process. Common errors if you have reformatted the card which isn't a good idea you need a cluster size of 4096. Windows 11 defaults to a larger cluster size. It must be in Fat32, people pick NTFS, it wont work with that. Best in anycase just to delete what is on the card rather than reformat. You need to use 7zip to unzip... that's recommended.
If using a Mac you are suppose to use Keka and CleanMyDrive on the SD card after. Definite must on a mib2 high. Mac hidden characters get left which may upset a mib2 standard but definitely will stop the mib2 high process of map update if you don't use CleanMy drive if using a Mac.
FIle preperation is covered in the VW
how to attached. People don't get the directory structure correct.
With the NDS file fix if you have lost yours (The workaround) you sometimes need to take that old Skoda NDS fike and copy into place on the latest maps. Try the year dot fix which would give old maps, then use the NDS file on the latest maps. Try both. Sometimes it springs into life using the old release, for others it doesn't but the old NDS file when used with the current release works.
In all cases you need to do this on the VAG map card, you can't use an ordinary SD card that wont work. Some people who do mess up their SD card via a format have had to buy a replacement card from an e-seller. Then use the old NDS file.