Download the backup from where, though? I honestly don't know where it goes! I also don't actually have an SD card in the thing anymore.

Unfortunately the router thing is a nonstarter for me, since I work in the field so often. I mean, yeah, they probably run off a 12V wall-wart so I could just run one more cable from my battery, but that battery is also running a lot of other things these days!

That's why plugging a cable straight from the computer into the Pi is attractive.