Your device does not recognise maps on an SD card in the same way. Rename & arrange as the image below
Thanks
You need to allow your PC to show system folders
Already done that. I have noted that some units show the .system folder, some don't ??!??
maybe pc treats each unit differently??
Got the file, thanks. Now know what to do next time.
Believe it or not, I managed to update the unit by using the following method.
Booted up an old laptop that has older version of express. Turned off internet access. loaded express with unit connected. unit once again shutdown but express didn't. express said not connected to internet so enabled internet. express then showed all updates and i downloaded and installed them.
Express then checked gps unit for final time. unit shut down and then express shut down.
Not sure if that trick will work again, but at least i can now update maps in the future on to sd card. Thank you again.
Still a puzzle how unit shuts down. Maybe a small error happened when firmware was updated some 6 years ago??