What do the different coloured LEDs indicate on my digivu when connected to a Vehicle Unit?

The memory LED, indicated by an icon resembling a computer chip, will show GREEN for sufficient memory available, AMBER for 75% memory used and RED for insufficient space for the current download.

The activity LED, indicated by an icon of two arrows, will flash AMBER indicating active communication between digivu and tachograph, show RED indicating an error in the download process and GREEN when the download has been successful.