jbl

My old sat nav needs the maps updating so I have a choice between a DVD update disc from the manufacturer or a SD card with the updates on from ebay. Ignoring the ebay/moral/pirate/genuine issues etc etc, is the SD replacement likely to cause any issues, is it just a remove old and pop in new and go ? This assumes that the SD is ok I suppose, but feed back seems good.
Any thoughts ?

Cheers

JBL