I installed the 2.280 software in several units.
The basemap file for the Helix 7 is 1.6GB and was no problem to download and install.
The base map for the 9, 10, 12 is over 5GB and I could not download it with my internet connection it would time out at 3.5 GB.
Robert put it on Google Drive and that worked so I have installed the basemap in a couple of units with no issue. Still have the files on a memory card to do other units.