Thanks for the detailed replies I will have a bash at this tomorrow.
Stupid question but do I just use the SDCard that is provided by Seat or do I need to buy a new one ?
Also does this mean back up the orginal SDCard ?
Thanks again
Thanks again What we are trying to do is get you reset back to what you had before so you can move forward with the update working on the basis that the overall.nds file has got lost and you haven't got the right one now on the SD card. To put that right you take the 0915 Map directory and it's contents which is the correct one for the card based on what you have said.
Then you can save what ever you have on the SD card now but reckon it's corrupted.
No you must use the original file. Delete what's on it.
Use 7-Zip to extract and copy the contents of the 915 download unzipped onto the SD Card. Just drag and drop the map directory after unzipping onto the HD then onto SD card - faster as two stage and you have an unzipped copy.
You should have the Map directory as the top directory and the rest below on the SD card.
Forget the 0915_MP171-1284.xEUR1.md5sum.txt we don't need it.
You should now have a working system back again of the ECE1 2018 Maps if you put it in... clip the SD card. Now start again. That overall.nds is the all important file you lost and you must keep safe.