Nikon Z9 Mirrorless Camera - Manual (Page 323)

323 Computers: Connecting via USB
Connect the camera using the supplied USB cable. You can then use
NX Studio software to copy pictures to the computer for viewing and
editing.
Installing NX Studio
You will need an Internet connection when installing NX Studio. Visit
the Nikon website for the latest information, including system
requirements.
• Download the latest NX Studio installer from the website below and
follow the on-screen instructions to complete installation.
https://downloadcenter.nikonimglib.com/
• Note that you may be unable to download pictures from the camera
using earlier versions of NX Studio.
Computers: Connecting via USB