1) setup a remote share and do this over the internet Or 2) use microSD, USB or some other trivial medium and mail it.
I’m all for the NAS approach but for that’s a lot of trouble and a large package to be sending (more money on FedEx or whatever).
Alternatively if you will be carrying this with you, get a phone with enough free space and just put it on your phone to take back and forth. If I were going in person this is what I’d do. Just drop the data in my iPhone and pull it out when I got there. 100GB isn’t trivial, but it is kinda small and fits on many, many different (and cheaper) mediums. Even a BD, don’t they have 100gb and 133gb variants?