Thanks for your help. I think it’s working now.
It was confusing. It was only trying to download the loader, but it didn’t actually say that. It still wanted 127 gigs of space even though it was only going to download the 1.4 gig loader.
Now all I have to do is wait for the update to download and install. My connection speed is faster, but for some reason it’s only downloading 54 gigs at around 4 mb/s. It’s going to take a while. I haven’t actually got to fly a plane yet, but I think it’s promising. 
Thank you both for your help.