What's the best way to transfer 50 gb of files from one Linux computer to another?
torrents. Honestly the best way to transfer many gigs from any OS. Pick a torrent client, make a torrent of the folder, open the torrent on the other computer. It's much easier to start and stop than other methods, even if it's a tad slower than copying to a flash drive
64gb micro SD cards are cheap if you go that route