Ok so I’m a newbie with an 810 base maps model. I’ve downloaded the osm from the osm site to my computer,but do I need to put it them on an sd card then put the card in my 810? Or can I put them on my 810 without an sd card?

Sorry for sounding dumb I’m useless with tech!!

From what I can remember, everything you need to know is right here: http://www.dcrainmaker.com/2013/01/garmin-edge-810-in-depth-review.html