The Nikon ZR camera is rumored to support SSD recording via USB with a firmware update that will be released after the camera starts shipping (the current shipping date is October 20th). Currently, no Nikon Z series cameras offer direct external SSD recording via USB. For high-speed video recording, Nikon relies on external video recorders, such as the Atomos Ninja V, connected via the camera’s HDMI port.
Nikon Zr pre-order links:
Join the new Nikon ZR Facebook group