After evaluation, I have found that the SanDisk product is fairly useless for use with the Teslacam.
1) You have to unplug it from the car and manually put the device into WiFi mode to access the videos. When it is plugged in, the device never goes out of "USB Mode" on the Tesla Model 3. I guess the car always supplies power to the USB port even when the car is off.
2) The app does not let you download folders, only individual files. This makes it impossible to wirelessly transfer the webcam videos to any other device since the TeslaCam system creates many, many folders for the files. The drive cannot be mounted as a drive on a computer either.
3) The device I got was flakey and eventually stopped working in USB mode at all.
I sent it back to Amazon and got a regular USB drive with a lightning port to use with the car.