share a folder on your pc
on the mac apple k, then connect via your pc’s ip address whatever that is (smb://10.0.0.2, you’ll need the smb bit).
You can automatically load this folder in your system prefs>accounts>startup items(just drag the server into there once you’ve got it loaded up, allow keychain.)
Then you’ve got a folder on your pc and mac that will easily transfer files between both, assuming you a network setup.
There will be very few compataibilty issues, fonts will be your main one on documents. but even then ttf files, work on mac and pc generally.
mp3’s will be fine and video will be fine as long as you use a player like VLC that comes with it’s own codecs.