I bought the Micro SD cards because I thought it would be better so that all the maps are on the card and can just plug it into my GPS. However, if you want to download specific routes or biking routes which I have done, you have to also purchase Way Point Trip Manager in order to transfer the information. If you purchase the CD you can transfer the information with Map Source which is included with the GPS. Had I known that I would have had to purchase extra software to be able to transfer the information, I would have bought the CD's. See more reviews about: Garmin Europe Map for detailed Maps Of Major Metropolitan Areas In Europe (microSD/SD Card)
