Well you will need a 64gb for the maps!!
Do you understand torrents and have a program on your Mac to handle them?
http://www.macworld.co.uk/feature/ma...r-mac-3501232/
If you do then just go the web site and click on NEXT 2017-1 to start the download.
You will then need a program to decompress the Zipped files.
http://www.macworld.co.uk/how-to/mac...s-mac-3458501/
Does that make sense or is it all gobbledygook!!