Best to have the interface to the air gapped machine (if windaz) via a wired connected Linux box and sync USB on Linux to a folder on windows via syncthing. That way you need a Linux compromise, a syncthing compromise, and the windaz compromise to get across the gap.
Which is what I'm setting up for fun.
I also quite like syncthing, not quite as nice as proper networking but it bears running SMBs or the myriad of other likely vulnerable Win networking crap!
[–] [deleted] 1 point -1 points 0 points (+0|-1) ago
[–] TheCompanionCube 0 points 1 point 1 point (+1|-0) ago
Good basic idea but that won't stop any modern exploits
[–] tame ago
So, like, any virus pre-1995? Except I guess 3.5" floppies were more "hand drives".