Once downloaded to my computer I transferred the file to a an SD card and then put the SD card into my RNS 510.
I went into 'setup' then 'navigation' and tried to go into 'my points of interest' but it wasn't lit up so I wasn't able to click on it.
From what I've seen on this site I need to go into 'my points of interest' and import the speed camera POI but obviously I can't do that. I'm wondering if I have done something wrong and if someone can help me.
These were the instructions I followed-
Save downloaded DB3 file to your USB drive or SD card into the 'x://PersonalPOI/' folder, disconnect USB/SD from your computer, insert it into your RNS and follow the prompts:
[Setup] -> [Navigation] -> [My Points of Interest] ->[Import]
than go to
[Setup] -> [Map] -> [Select Map Details] and select permanent POIs (Safety/Private/...)
When I transferred the POI onto the SD there was no 'x://PersonalPOI/' folder so I just transferred it straight onto the SD card.