Finally ready to switch my final windows device over to linux, but I'm running into a problem. NTFS drives aren't a good idea under Linux, but my 4 NTFS drives are this full. I own zero extra hard drives, and do not want to spend $300 on another one. 
How can I bring these files into Bazzite WITHOUT just wiping everything and re-downloading 10+ terabytes of movies, shows, music, games, and other data I refuse to delete?
You will have to reinstall your pirated games from the repack and let Lutris (or Heroic or Faugus or whatever other launcher gui) make a wine prefix (sort of a fake little windows filesystem for each game to live in) for each game. Trying to just take the already installed games and make proton run them will result in all sorts of weird hard to fix problems.