Does Tracker show up as a USB drive while connected to a computer?

No, it does not. However, starting with firmware 1.1.20 you can enable the Media Transfer Protocol to copy files from and to your SD card when the device is connected to your computer. You can do this via the Config screen, in the "File transfer" section.

On Windows 10 you should see the device in Explorer. On macOS, you need to use the Android File Transfer application. If you're a Homebrew user, you can also install simple-mtpfs.

If any of this is not working on your configuration, please use the supplied SD card USB adapter for transferring files.