Gphoto2 saving image in buffer of camera

[PeterWar]

I'm developing a script to capture fast action sequence on my Sony A7III camera but I'm limited tot he saving speed to the SD camera in the buffer. I've tried many gphoto commands and the one that seems to save the images in the fastest way is:

gphoto2 --trigger-capture --wait-event=CAPTURECOMPLETE--filename "$(date +%Y%m%d_%H%M%S).arw" --keep

Describe the solution you'd like
It would be great that gphoto2 could just save the photos in the camera buffer and download them to the computer after the action event. That way I could make use of the camera buffer to capture photos at several fps.

Describe alternatives you've considered
gphoto2 --set-config capturetarget=0
gphoto2 --trigger-capture
gphoto2 --capture-image
gphoto2 --capture-image-and-download

Additional context
I've contributed to gphoto with a 20€ donation, I think this is a great initiative.