Calvin_BT: One question: Is the BC Drivers are Windows Support Software

Loner T: Yes. BC is Bootcamp. BC drivers and Windows Support Software are the same.

Calvin_BT: I donâ  t have any external usb drive to download BC drivers

Calvin_BT: Or add a partition

Loner T: You can temporarily install Paragon for NTFS, download the BC drivers, copy them to Windows side, uninstall Paragon, boot into Windows and try to install the drivers.

Calvin_BT: Now I assume that I had several questions.
Can I temporarily partition my mac to download Windows Support Software instead?
Hope I had enough mac storage

Loner T: If you partition the disk, with Windows already installed, you will cause problems with the existing installation. 

Calvin_BT: Oh ok I will try it later

Calvin_BT: But how?