Of course the easiest solution is to just run everything from the BiaB USB hard drive.

There is no updating.

No deleting files.

Nothing. *

People here have commented about "performance issues" with running BiaB from the hard drive.
I've never noticed any performance problem running the app from the USB drive.

* The only warning is to always make sure to drag track files to a specific project folder on your C: drive so you don't lose them when replacing the USB drive. I learned that the hard way.