Creating ISO with large files

xorriso -as mkisofs \
-o /hds/1tb/tmp/mystuff.iso \
-iso-level 3 \
-full-iso9660-filenames \
-volid MyStuff \
/hds/12tb/mystuff

As simple as that, now you can just mount the ISO image and files larger than 4GB will just work, but it seems that filenames are correct in Linux, but in ALL CAPS in windows

Should start experimenting with

xorriso -as mkisofs \
  -o /hds/1tb/tmp/mystuff.iso \
  -iso-level 3 \
  -full-iso9660-filenames \
  -J \
  -R \
  -volid MyStuff \
  /hds/12tb/mystuff

I am pasting this here because all the other methods (Mounting and writing to, or using the traditional tools seem to fail for some reason)