Both are 64-bit versions of Windows but should work fine using the 32-bit versions of everything. I created the USB drive from my Windows 10 workstation and later tested it from a Windows 7 laptop. How big was the entire footprint, and would it depend on your flavor of windows? I'd be interested, but don't know how to go about setting it up for the flash drive vs the pc. If anyone is interested in trying this I'd be happy to help out if you get stuck.Sounds like a great idea to me. If anyone is interested in trying this I'd be happy to help out if you get stuck.

Theoretically FIRST could optionally offer a pre-loaded USB drive in the future along with the kit of parts. While I did this under windows I have no reason to think you couldn't set up something equivalent for MacOs or Linux. With this technique you'd theoretically be able to use someone else's machine in a pinch. I've seen teams have trouble with laptops at competitions while frantically trying to make program changes right before a match. If nothing else this would be a good backup solution in an emergency. While I don't yet have the ZTE speed I have no reason to think that this won't work with it since it supports OTG.

Because I'm using a USB 3.0 OTG drive I was then able to plug the drive directly into my phone and install the APK from there. To verify I plugged it into a PC that had never had any of these components and successfully built the robot controller apk. I managed to install Android Studio/Java SDKs/Android SDK on a USB flash drive and configure it so that it runs entirely off of that drive.

Ftc android studio install instructions