Ausyoz do you need to transfer the files from SD to PC to phone? there are card readers that just hook up to your phone (usb c, or there are adaptors from usb A to lightning)
I've got a GoPro 10 black (I dont think 11 and 12 have internal gps) and the workflow for me is as follows:
- start/resume the racechrono session and turn on the gopro (to get the gps set in)
- pull up to the start line and start the gopro recording
- finish my timeattack run, turn off gopro recording, turn off racechrono recording
after this you take out the sd card from the gopro (there are "easy to remove" battery covers on ali) - or you can transfer it over camera wifi but that takes forever, copy the file to my phone
import the file to racechrono, add it to the session, and then you can link it via a button above the video and just finetune it by couple of ms if you think its off (having the phone in sight on your onboard helps a lot with that), and then you can export it with the racechrono overlay, save that .mp4 to the sdcard and upload that wherever you want from your pc - end result here
there probably is a simpler workflow if you start the recording through the app, which is possible with gopros (at least), but I personally like to have the control of the camera separated, and also to have the telemetry fullscreen on the phone from the getgo to be sure everything is running as it should..
its probably not what you asked for exactly but just a bit of insight how someone else works with the available equipment..