BioSehnsucht
Model 3 LR
Actually.. the Pi 4 is the first "normal sized" Raspberry Pi device that supports USB OTG. The USB-C power input port is also a USB OTG port.The Pi Zero W works great as a USB stick that pushes files to another computer. The build with the prebuilt image from marcone/teslausb is very easy to set up - you just have to configure your WiFi network credentials and your file share credentials, and (optionally) split the drive into two partitions, one for music and one for video from the car.
I wouldn't expect that the Pi 4 would work for this, since it can't be programmed to be a USB device, only as a USB controller. I'd love to be wrong, since the Pi4 is a nifty device, but both Raspberry Pi and the TeslaUSB documentation is pretty emphatic on this point.
I've already tested it and it works (though not tested with any of the off the shelf solutions like marcone/teslausb - I am working on my own flavor and I verified my code works on the 4, YMMV as to whether there needs to be special support for the 4 vs the Zero W, I haven't tried any of them so I don't know).