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?
Would an overlay filesystem work? Its been a long time since I looked at it (and it was for very different purposes) but if you can get NTFS game drive mounted as a read only layer of an overlay fs and then idk some ext4 as the writeable layer, you can prevent writing data to the NTFS drive and making windows sad with illegal filenames, while also getting to like, yk, save your savegames and whatnot.
Might make loading times pretty long tho. Idk what the overhead is for an overlay fs.